Помогите пожалуйста, заранее спасибо. Created by way51. algebra-ru

ОДЗ: 7-x²≥0 и -6x≥0 x² -7≤0 x≤0 (x-√7)(x+√7)≤0 + - +---------- -√7 ------------ √7 ------------- \\\\\\\\\\\\\\\\\\ x∈[-√7; √7]{x∈[-√7; √7]{x≤0 ⇒ x∈[-√7; 0]7-x²= -6x-x²+6x+7=0x²-6x-7=0D=(-6)² -4*(-7)=36+28=64=8²x₁=(6-8)/2= -2/2= -1x₂=(6+8)/2=14/2=7∉[-√7; 0] - не корень уравнения.Проверка корня:х= -1√(7-1)=√(-6*(-1))√6=√6 - верноОтвет: -1.Pacanka202Pacanka202Возведём в квадрат обе части уравнения:7–х^2=–6хх^2–6х–7=0Д=/36–4•1•(-7)=/64=8х1=(6+8)/2=7х2=(6–8)/2=–1Новые вопросы в АлгебраСрочно нужно решить через дискриминант 16х^2 - 8х + 1 = 0 пж пж пж Помогите срочно нужно решить пожалуйста, задание на фотоПомогите срочно, задание на фото,тут тоже уже другое заданиеПомогите срочно, задание на фото,тут уже другоеПомогите срочно, задание на фото214. Моторний човен проплив 8 км за течією річки й повернувся назад, витративши на весь шлях 54 хв. Знайдіть швидкість течії річки, якщо власна швидкі…сть човна становить 18 км/год.Решите пожалуйста с подробным объяснением.Поясніть будь ласка простими словами (бажано з прикладами) що таке теорія ймовірності і як її використовувати!(-0.2)^5 : (0.1)^4Сколько будет помогитеСкільки площин симетрії має правильна трикутна призма?ПредыдущийСледующийВместе мы знаем большеЭтот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере.КОМПАНИЯО насБлогКарьераУсловия пользованияАвторское правоПолитика конфиденциальностиПолитика использования файлов cookieПредпочтения cookie-файловСООБЩЕСТВОСообщество BrainlyBrainly для школ и учителейСообщество родителейКодекс честиПравила сообществаBrainly InsightsСтань помощникомПОМОЩЬЗарегистрируйсяЦентр помощиЦентр безопасностиДоговор о конфиденциальности полученной информацииУстанови приложение BrainlyСкачай iOS-приложениеСкачай для AndroidШкольные Знания.comPL: Brainly.plES: Brainly.latPT: Brainly.com.brFR: Nosdevoirs.frTR: Eodev.comRO: Brainly.roID: Brainly.co.idHI: Brainly.inPH: Brainly.phUS: Brainly.com (function() { window.jsData = window.jsData || {}; window.jsData.domain = 'znanija.com'; window.jsData.siteName = 'Школьные Знания.com'; window.jsData.dateFormat = 'd.m.Y'; window.jsData.footerConfig = {"socialMedia":[{"icon":"youtube","url":"https:\/\/www.youtube.com\/channel\/UCQ929YFR7IGeKlv-nXn-Qug?view_as=subscriber","ariaLabel":"youTube link"}],"company":[{"titleTranslationKey":"about_us_footer_link","url":"https:\/\/careers.brainly.com\/our-culture\/"},{"titleTranslationKey":"blog_footer_link","url":"https:\/\/blog.znanija.com"},{"titleTranslationKey":"careers_footer_link","url":"https:\/\/careers.brainly.com\/"},{"titleTranslationKey":"terms_of_use_footer_link","url":"https:\/\/znanija.com\/pages\/prawila","noHref":true},{"titleTranslationKey":"copyright_policy_footer_link","url":"https:\/\/znanija.com\/avtorskoe-pravo"},{"titleTranslationKey":"privacy_policy_footer_link","url":"https:\/\/znanija.com\/pages\/politika_konfidentsialnosti"},{"titleTranslationKey":"cookie_policy_footer_link","url":"https:\/\/znanija.com\/pages\/cookies_politika"},{"titleTranslationKey":"cookie_privacy_footer_link","handlerKey":"cookie_privacy_footer_link"}],"community":[{"titleTranslationKey":"brainly_community_footer_link","url":"https:\/\/znanija.com\/soobshestvo"},{"titleTranslationKey":"for_schools_teachers_footer_link","url":"https:\/\/znanija.com\/shkola-i-uchitelia"},{"titleTranslationKey":"brainly_for_parents_footer_link","url":"https:\/\/znanija.com\/roditeli"},{"titleTranslationKey":"honor_code_footer_link","url":"https:\/\/znanija.com\/kodeks-chesti"},{"titleTranslationKey":"community_guidelines_footer_link","url":"https:\/\/znanija.com\/pravila-soobshestva","noHref":true},{"titleTranslationKey":"brainly_insights_footer_link","url":"https:\/\/brainly.com\/insights"},{"titleTranslationKey":"become_a_volunteer_footer_link","url":"https:\/\/znanija.com\/volontery"}],"helpColumn":[{"titleTranslationKey":"signup_footer_link","url":"https:\/\/znanija.com\/signup?entry=1","noHref":true},{"titleTranslationKey":"help_center_footer_link","url":"https:\/\/faq-ru.brainly.com"},{"titleTranslationKey":"safety_center_footer_link","url":"https:\/\/znanija.com\/centr-bezopasnosti"},{"titleTranslationKey":"responsible_disclosure_agreement_footer_link","url":"https:\/\/brainly.com\/responsible-disclosure-program"}]}; window.jsData.styleGuideAssets = { logo: { small: 'https://styleguide.znanija.com/images/logos/znanija-mobile-200611d052.svg', big: 'https://styleguide.znanija.com/images/logos/znanija-addd85e6f5.svg', plusSmall: 'https://styleguide.znanija.com/images/logos/znanija-plus-small-495ddebd8c.svg', plus: 'https://styleguide.znanija.com/images/logos/znanija-plus-337423fa26.svg' }, application_icons: { x180: 'https://styleguide.znanija.com/images/app-icons/znanija/180x180-1c0ebd78f4.png', } }; window.jsData.staticDomain = 'z-dn.net' window.jsData.currentStaticRelatedQuestionIds = [] window.jsData.displayAdsEnabled = false window.jsData.videoAdsEnabled = false window.jsData.deviceInformation = {"is_lowend":false,"user_agent":"iOS-App\/4.20.58 Brainly\/5395 CFNetwork\/1331.0.7 Darwin\/21.4.0"} window.jsData.newestQuestions = [{"id":49781390,"content":"\u0421\u0440\u043e\u0447\u043d\u043e \u043d\u0443\u0436\u043d\u043e \u0440\u0435\u0448\u0438\u0442\u044c \u0447\u0435\u0440\u0435\u0437 \u0434\u0438\u0441\u043a\u0440\u0438\u043c\u0438\u043d\u0430\u043d\u0442 16\u0445^2 - 8\u0445 + 1 = 0 \u043f\u0436 \u043f\u0436 \u043f\u0436\u200b"},{"id":49781358,"content":"\u041f\u043e\u043c\u043e\u0433\u0438\u0442\u0435 \u0441\u0440\u043e\u0447\u043d\u043e \u043d\u0443\u0436\u043d\u043e \u0440\u0435\u0448\u0438\u0442\u044c \u043f\u043e\u0436\u0430\u043b\u0443\u0439\u0441\u0442\u0430, \u0437\u0430\u0434\u0430\u043d\u0438\u0435 \u043d\u0430 \u0444\u043e\u0442\u043e"},{"id":49781355,"content":"\u041f\u043e\u043c\u043e\u0433\u0438\u0442\u0435 \u0441\u0440\u043e\u0447\u043d\u043e, \u0437\u0430\u0434\u0430\u043d\u0438\u0435 \u043d\u0430 \u0444\u043e\u0442\u043e,\u0442\u0443\u0442 \u0442\u043e\u0436\u0435 \u0443\u0436\u0435 \u0434\u0440\u0443\u0433\u043e\u0435 \u0437\u0430\u0434\u0430\u043d\u0438\u0435"},{"id":49781354,"content":"\u041f\u043e\u043c\u043e\u0433\u0438\u0442\u0435 \u0441\u0440\u043e\u0447\u043d\u043e, \u0437\u0430\u0434\u0430\u043d\u0438\u0435 \u043d\u0430 \u0444\u043e\u0442\u043e,\u0442\u0443\u0442 \u0443\u0436\u0435 \u0434\u0440\u0443\u0433\u043e\u0435"},{"id":49781353,"content":"\u041f\u043e\u043c\u043e\u0433\u0438\u0442\u0435 \u0441\u0440\u043e\u0447\u043d\u043e, \u0437\u0430\u0434\u0430\u043d\u0438\u0435 \u043d\u0430 \u0444\u043e\u0442\u043e"},{"id":49781303,"content":"214. \u041c\u043e\u0442\u043e\u0440\u043d\u0438\u0439 \u0447\u043e\u0432\u0435\u043d \u043f\u0440\u043e\u043f\u043b\u0438\u0432 8 \u043a\u043c \u0437\u0430 \u0442\u0435\u0447\u0456\u0454\u044e \u0440\u0456\u0447\u043a\u0438 \u0439 \u043f\u043e\u0432\u0435\u0440\u043d\u0443\u0432\u0441\u044f \u043d\u0430\u0437\u0430\u0434, \u0432\u0438\u0442\u0440\u0430\u0442\u0438\u0432\u0448\u0438 \u043d\u0430 \u0432\u0435\u0441\u044c \u0448\u043b\u044f\u0445 54 \u0445\u0432. \u0417\u043d\u0430\u0439\u0434\u0456\u0442\u044c \u0448\u0432\u0438\u0434\u043a\u0456\u0441\u0442\u044c \u0442\u0435\u0447\u0456\u0457 \u0440\u0456\u0447\u043a\u0438, \u044f\u043a\u0449\u043e \u0432\u043b\u0430\u0441\u043d\u0430 \u0448\u0432\u0438\u0434\u043a\u0456\u0441\u0442\u044c \u0447\u043e\u0432\u043d\u0430 \u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c 18 \u043a\u043c\/\u0433\u043e\u0434.\u200b"},{"id":49781283,"content":"\u0420\u0435\u0448\u0438\u0442\u0435 \u043f\u043e\u0436\u0430\u043b\u0443\u0439\u0441\u0442\u0430 \u0441 \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u044b\u043c \u043e\u0431\u044a\u044f\u0441\u043d\u0435\u043d\u0438\u0435\u043c."},{"id":49781104,"content":"\u041f\u043e\u044f\u0441\u043d\u0456\u0442\u044c \u0431\u0443\u0434\u044c \u043b\u0430\u0441\u043a\u0430 \u043f\u0440\u043e\u0441\u0442\u0438\u043c\u0438 \u0441\u043b\u043e\u0432\u0430\u043c\u0438 (\u0431\u0430\u0436\u0430\u043d\u043e \u0437 \u043f\u0440\u0438\u043a\u043b\u0430\u0434\u0430\u043c\u0438) \u0449\u043e \u0442\u0430\u043a\u0435 \u0442\u0435\u043e\u0440\u0456\u044f \u0439\u043c\u043e\u0432\u0456\u0440\u043d\u043e\u0441\u0442\u0456 \u0456 \u044f\u043a \u0457\u0457 \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u043e\u0432\u0443\u0432\u0430\u0442\u0438!"},{"id":49780984,"content":"(-0.2)^5 : (0.1)^4\n\u0421\u043a\u043e\u043b\u044c\u043a\u043e \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043c\u043e\u0433\u0438\u0442\u0435"},{"id":49780927,"content":"\u0421\u043a\u0456\u043b\u044c\u043a\u0438 \u043f\u043b\u043e\u0449\u0438\u043d \u0441\u0438\u043c\u0435\u0442\u0440\u0456\u0457 \u043c\u0430\u0454 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0430 \u0442\u0440\u0438\u043a\u0443\u0442\u043d\u0430 \u043f\u0440\u0438\u0437\u043c\u0430?"}] window.jsData.nearestQuestions = { next: { url: '/task/24305160', id: '24305160' }, prev: { url: '/task/24305158', id: '24305158' } } window.jsData.pubmaticAllowedForIp = true window.jsData.userLocationInfo = {"location":{"city":{"geoname_id":5821086,"names":{"de":"Cheyenne","en":"Cheyenne","es":"Cheyenne","fr":"Cheyenne","ja":"\u30b7\u30e3\u30a4\u30a2\u30f3","pt-BR":"Cheyenne","ru":"\u0428\u0430\u0439\u0435\u043d\u043d","zh-CN":"\u590f\u5ef6"}},"continent":{"code":"NA","geoname_id":6255149,"names":{"de":"Nordamerika","en":"North America","es":"Norteam\u00e9rica","fr":"Am\u00e9rique du Nord","ja":"\u5317\u30a2\u30e1\u30ea\u30ab","pt-BR":"Am\u00e9rica do Norte","ru":"\u0421\u0435\u0432\u0435\u0440\u043d\u0430\u044f \u0410\u043c\u0435\u0440\u0438\u043a\u0430","zh-CN":"\u5317\u7f8e\u6d32"}},"country":{"geoname_id":6252001,"iso_code":"US","names":{"de":"USA","en":"United States","es":"Estados Unidos","fr":"\u00c9tats-Unis","ja":"\u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd","pt-BR":"Estados Unidos","ru":"\u0421\u0428\u0410","zh-CN":"\u7f8e\u56fd"}},"location":{"accuracy_radius":1000,"latitude":41.103400000000001,"longitude":-104.9059,"metro_code":759,"time_zone":"America\/Denver"},"postal":{"code":"82001"},"registered_country":{"geoname_id":6252001,"iso_code":"US","names":{"de":"USA","en":"United States","es":"Estados Unidos","fr":"\u00c9tats-Unis","ja":"\u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd","pt-BR":"Estados Unidos","ru":"\u0421\u0428\u0410","zh-CN":"\u7f8e\u56fd"}},"subdivisions":[{"geoname_id":5843591,"iso_code":"WY","names":{"en":"Wyoming","es":"Wyoming","fr":"Wyoming","ja":"\u30ef\u30a4\u30aa\u30df\u30f3\u30b0\u5dde","ru":"\u0412\u0430\u0439\u043e\u043c\u0438\u043d\u0433","zh-CN":"\u6000\u4fc4\u660e\u5dde"}}]},"ip":"107.189.11.241"} window.jsData.paymentsMode = '0'; window.jsData.styleGuideUrl = 'https://styleguide.znanija.com/'; window.jsData.androidAppUrl = 'https://play.google.com/store/apps/details?id=co.brainly&hl=ru'; window.jsData.iOSAppUrl = 'https://apps.apple.com/ru/app/id745089947'; // brainly store items window.jsData.subjects = [{"id":59,"name":"\u0423\u0445\u043e\u0434 \u0437\u0430 \u0441\u043e\u0431\u043e\u0439","slug":"uhod_za_soboi","icon":"personal-care","bestInName":"\u0423\u0445\u043e\u0434\u0435 \u0437\u0430 \u0441\u043e\u0431\u043e\u0439","filterName":"\u0423\u0445\u043e\u0434 \u0437\u0430 \u0441\u043e\u0431\u043e\u0439","occupants":0,"rankable":"1","enabled":false},{"id":29,"name":"\u041c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a\u0430","slug":"matematika","icon":"mathematics","bestInName":"\u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a\u0435","filterName":"\u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":17,"name":"\u041b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0430","slug":"literatura","icon":"literature","bestInName":"\u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","filterName":"\u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","occupants":0,"rankable":"1","enabled":true},{"id":30,"name":"\u0410\u043b\u0433\u0435\u0431\u0440\u0430","slug":"algebra","icon":"algebra","bestInName":"\u0430\u043b\u0433\u0435\u0431\u0440\u0435","filterName":"\u0430\u043b\u0433\u0435\u0431\u0440\u0435","occupants":0,"rankable":"1","enabled":true},{"id":16,"name":"\u0420\u0443\u0441\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"russkii_yazyk","icon":"russian-alt","bestInName":"\u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0440\u0443\u0441\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":31,"name":"\u0413\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u044f","slug":"geometriya","icon":"geometry","bestInName":"\u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0438","filterName":"\u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":33,"name":"\u0410\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"angliiskii_yazyk","icon":"english","bestInName":"\u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":10,"name":"\u0425\u0438\u043c\u0438\u044f","slug":"himiya","icon":"chemistry","bestInName":"\u0445\u0438\u043c\u0438\u0438","filterName":"\u0445\u0438\u043c\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":9,"name":"\u0424\u0438\u0437\u0438\u043a\u0430","slug":"fizika","icon":"physics","bestInName":"\u0444\u0438\u0437\u0438\u043a\u0435","filterName":"\u0444\u0438\u0437\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":3,"name":"\u0411\u0438\u043e\u043b\u043e\u0433\u0438\u044f","slug":"biologiya","icon":"biology","bestInName":"\u0431\u0438\u043e\u043b\u043e\u0433\u0438\u0438","filterName":"\u0431\u0438\u043e\u043b\u043e\u0433\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":42,"name":"\u0414\u0440\u0443\u0433\u0438\u0435 \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u044b","slug":"drugie_predmety","icon":"others","bestInName":"\u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u0430\u0445","filterName":"\u0414\u0440\u0443\u0433\u0438\u0435 \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u044b","occupants":0,"rankable":"1","enabled":true},{"id":13,"name":"\u0418\u0441\u0442\u043e\u0440\u0438\u044f","slug":"istoriya","icon":"history","bestInName":"\u0438\u0441\u0442\u043e\u0440\u0438\u0438","filterName":"\u0438\u0441\u0442\u043e\u0440\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":15,"name":"\u041e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u0437\u043d\u0430\u043d\u0438\u0435","slug":"obshtestvoznanie","icon":"social-science","bestInName":"\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u0437\u043d\u0430\u043d\u0438\u044e","filterName":"\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u0437\u043d\u0430\u043d\u0438\u044e","occupants":0,"rankable":"1","enabled":true},{"id":46,"name":"\u041e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0438\u0439 \u043c\u0438\u0440","slug":"okruzhayushtii_mir","icon":"environment","bestInName":"\u043e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0435\u043c \u043c\u0438\u0440\u0435","filterName":"\u041e\u043a\u0440\u0443\u0436\u0430\u044e\u0449\u0438\u0439 \u043c\u0438\u0440","occupants":0,"rankable":"1","enabled":true},{"id":8,"name":"\u0413\u0435\u043e\u0433\u0440\u0430\u0444\u0438\u044f","slug":"geografiya","icon":"geography","bestInName":"\u0433\u0435\u043e\u0433\u0440\u0430\u0444\u0438\u0438","filterName":"\u0433\u0435\u043e\u0433\u0440\u0430\u0444\u0438\u0438","occupants":0,"rankable":"1","enabled":true},{"id":37,"name":"\u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0430 \u043c\u043e\u0432\u0430","slug":"ukrainsyka_mova","icon":"ukrainian-alt","bestInName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":32,"name":"\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0442\u0438\u043a\u0430","slug":"informatika","icon":"informatics","bestInName":"\u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0442\u0438\u043a\u0435","filterName":"\u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0442\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":41,"name":"\u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0430 \u043b\u0456\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0430","slug":"ukrainsyka_l_teratura","icon":"ukrainian-literature","bestInName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u0439 \u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","filterName":"\u0443\u043a\u0440\u0430\u0438\u043d\u0441\u043a\u043e\u0439 \u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u0435","occupants":0,"rankable":"1","enabled":true},{"id":44,"name":"\u049a\u0430\u0437\u0430\u049b \u0442i\u043bi","slug":"kazak_tili","icon":"kazach-alt","bestInName":"\u043a\u0430\u0437\u0430\u0445\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u043a\u0430\u0437\u0430\u0445\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":22,"name":"\u042d\u043a\u043e\u043d\u043e\u043c\u0438\u043a\u0430","slug":"ekonomika","icon":"economics","bestInName":"\u044d\u043a\u043e\u043d\u043e\u043c\u0438\u043a\u0435","filterName":"\u044d\u043a\u043e\u043d\u043e\u043c\u0438\u043a\u0435","occupants":0,"rankable":"1","enabled":true},{"id":48,"name":"\u041c\u0443\u0437\u044b\u043a\u0430","slug":"muzyka","icon":"music","bestInName":"\u043c\u0443\u0437\u044b\u043a\u0435","filterName":"\u041c\u0443\u0437\u044b\u043a\u0430","occupants":0,"rankable":"1","enabled":true},{"id":25,"name":"\u041f\u0440\u0430\u0432\u043e","slug":"pravo","icon":"law","bestInName":"\u043f\u0440\u0430\u0432\u0435","filterName":"\u041f\u0440\u0430\u0432\u043e","occupants":0,"rankable":"1","enabled":true},{"id":49,"name":"\u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f","slug":"tehnologiya","icon":"technology","bestInName":"\u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438","filterName":"\u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f","occupants":0,"rankable":"1","enabled":false},{"id":43,"name":"\u0411\u0435\u043b\u0430\u0440\u0443\u0441\u043a\u0430\u044f \u043c\u043e\u0432\u0430","slug":"belaruskaya_mova","icon":"belarus-alt","bestInName":"\u0431\u0435\u043b\u043e\u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0431\u0435\u043b\u043e\u0440\u0443\u0441\u0441\u043a\u043e\u043c\u0443 \u044f\u0437\u044b\u043a\u0443","occupants":0,"rankable":"1","enabled":true},{"id":47,"name":"\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"francuzskii_yazyk","icon":"french","bestInName":"\u0444\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","occupants":0,"rankable":"1","enabled":true},{"id":45,"name":"\u041d\u0435\u043c\u0435\u0446\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","slug":"nemeckii_yazyk","icon":"german","bestInName":"\u043d\u0435\u043c\u0435\u0446\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435","filterName":"\u041d\u0435\u043c\u0435\u0446\u043a\u0438\u0439 \u044f\u0437\u044b\u043a","occupants":0,"rankable":"1","enabled":true},{"id":50,"name":"\u0427\u0435\u0440\u0447\u0435\u043d\u0438\u0435","slug":"cherchenie","icon":"geometry","bestInName":"\u0447\u0435\u0440\u0447\u0435\u043d\u0438\u0438","filterName":"\u0427\u0435\u0440\u0447\u0435\u043d\u0438\u0435","occupants":0,"rankable":"1","enabled":false},{"id":51,"name":"\u041c\u0425\u041a","slug":"mhk","icon":"art","bestInName":"\u041c\u0425\u041a","filterName":"\u041c\u0425\u041a","occupants":0,"rankable":"1","enabled":true},{"id":52,"name":"\u041e\u0411\u0416","slug":"obzh","icon":"security","bestInName":"\u041e\u0411\u0416","filterName":"\u041e\u0411\u0416","occupants":0,"rankable":"1","enabled":true},{"id":53,"name":"\u041f\u0441\u0438\u0445\u043e\u043b\u043e\u0433\u0438\u044f","slug":"psihologiya","icon":"psychology","bestInName":"\u041f\u0441\u0438\u0445\u043e\u043b\u043e\u0433\u0438\u0438","filterName":"\u041f\u0441\u0438\u0445\u043e\u043b\u043e\u0433\u0438\u044f","occupants":0,"rankable":"1","enabled":true},{"id":54,"name":"\u041e\u02bbzbek tili","slug":"o_zbek_tili","icon":"uzbek","bestInName":"\u041e\u02bbzbek tili","filterName":"\u041e\u02bbzbek tili","occupants":0,"rankable":"1","enabled":true},{"id":55,"name":"\u041a\u044b\u0440\u0433\u044b\u0437 \u0442\u0438\u043b\u0438","slug":"kyrgyz_tili","icon":"kyrgyz","bestInName":"\u041a\u044b\u0440\u0433\u044b\u0437 \u0442\u0438\u043b\u0438","filterName":"\u041a\u044b\u0440\u0433\u044b\u0437 \u0442\u0438\u043b\u0438","occupants":0,"rankable":"1","enabled":true},{"id":56,"name":"\u0410\u0441\u0442\u0440\u043e\u043d\u043e\u043c\u0438\u044f","slug":"astronomiya","icon":"astronomy","bestInName":"\u0410\u0441\u0442\u0440\u043e\u043d\u043e\u043c\u0438\u0438","filterName":"\u0410\u0441\u0442\u0440\u043e\u043d\u043e\u043c\u0438\u044f","occupants":0,"rankable":"1","enabled":true},{"id":57,"name":"\u0424\u0438\u0437\u043a\u0443\u043b\u044c\u0442\u0443\u0440\u0430 \u0438 \u0441\u043f\u043e\u0440\u0442","slug":"fizkulytura_i_sport","icon":"physical-education","bestInName":"\u0424\u0438\u0437\u043a\u0443\u043b\u044c\u0442\u0443\u0440\u0435","filterName":"\u0424\u0438\u0437\u043a\u0443\u043b\u044c\u0442\u0443\u0440\u0430 \u0438 \u0441\u043f\u043e\u0440\u0442","occupants":0,"rankable":"1","enabled":true},{"id":58,"name":"\u0415\u0413\u042d \/ \u041e\u0413\u042d","slug":"ege_oge","icon":"egzam","bestInName":"\u0415\u0413\u042d \/ \u041e\u0413\u042d","filterName":"\u0415\u0413\u042d \/ \u041e\u0413\u042d","occupants":0,"rankable":"1","enabled":false}]; window.jsData.grades = [{"id":1,"name":"1 - 4 \u043a\u043b\u0430\u0441\u0441\u044b","slug":"1_4_klassy","icon":"lvl1","filterName":"1-4 \u043a\u043b\u0430\u0441\u0441\u044b"},{"id":2,"name":"5 - 9 \u043a\u043b\u0430\u0441\u0441\u044b","slug":"5_9_klassy","icon":"lvl2","filterName":"5-9 \u043a\u043b\u0430\u0441\u0441\u044b"},{"id":3,"name":"10 - 11 \u043a\u043b\u0430\u0441\u0441\u044b","slug":"10_11_klassy","icon":"lvl3","filterName":"10-11 \u043a\u043b\u0430\u0441\u0441\u044b"},{"id":4,"name":"\u0441\u0442\u0443\u0434\u0435\u043d\u0447\u0435\u0441\u043a\u0438\u0439","slug":"studencheskii","icon":"lvl4","filterName":"\u0441\u0442\u0443\u0434\u0435\u043d\u0447\u0435\u0441\u043a\u0438\u0439"}]; window.jsData.ranks = []; window.jsData.challenges = []; // end brainly store items window.jsData.htmlLang = 'ru'; window.jsData.brainlyPages = [{"name":"Brainly.pl","symbol":"PL","url":"https:\/\/brainly.pl","language":"Polski","region":"Polska","regionCode":"PL","code":"pl"},{"name":"Znanija.com","symbol":"RU","url":"https:\/\/znanija.com","language":"\u0420\u0443\u0441\u0441\u043a\u0438\u0439","region":"\u0420\u043e\u0441\u0441\u0438\u044f","regionCode":"RU","code":"ru"},{"name":"Brainly.lat","symbol":"ES","url":"https:\/\/brainly.lat","language":"Espa\u00f1ol","region":"Espa\u00f1a","regionCode":"ES","code":"es"},{"url":"https:\/\/brainly.lat","language":"Espa\u00f1ol","region":"Latinoam\u00e9rica","regionCode":"ES","code":"es"},{"name":"Brainly.com.br","symbol":"PT","url":"https:\/\/brainly.com.br","language":"Portugu\u00eas","region":"Brasil","regionCode":"BR","code":"pt"},{"name":"Nosdevoirs.fr","symbol":"FR","url":"https:\/\/nosdevoirs.fr","language":"Fran\u00e7ais","region":"France","regionCode":"FR","code":"fr"},{"name":"Eodev.com","symbol":"TR","url":"https:\/\/eodev.com","language":"T\u00fcrk\u00e7e","region":"T\u00fcrkiye","regionCode":"TR","code":"tr"},{"name":"Brainly.ro","symbol":"RO","url":"https:\/\/brainly.ro","language":"Rom\u00e2n\u0103","region":"Rom\u00e2nia","regionCode":"RO","code":"ro"},{"name":"Brainly.co.id","symbol":"ID","url":"https:\/\/brainly.co.id","language":"Bahasa Indonesia","region":"Indonesia","regionCode":"ID","code":"id"},{"name":"Brainly.in","symbol":"HI","url":"https:\/\/brainly.in","language":"English","region":"India","regionCode":"IN","code":"en-IN"},{"name":"Brainly.ph","symbol":"PH","url":"https:\/\/brainly.ph","language":"English","region":"Pilipinas","regionCode":"PH","code":"en-PH"},{"name":"Brainly.com","symbol":"US","url":"https:\/\/brainly.com","language":"English","region":"United States","regionCode":"US","code":"en-US"}] window.jsData.registerTosLinkInTextUrl = 'http://znanija.com/pages/politika_konfidentsialnosti'; window.jsData.hasPaymentsEnabled = true; window.jsData.paymentsConfig = { currency: '', faqPageUrl: 'https://faq-ru.brainly.com', contactEmail: 'plus@znanija.com', }; window.jsData.paymentsByPayU = true; window.jsData.registrationParentRow = true; window.jsData.paymentsByPayUPublicKey = '7a985100-4936-430e-83cf-af6ea914af9b'; window.jsData.paymentsByPayUEnvName = 'live'; window.jsData.availableRatePlanIds = ["cmF0ZVBsYW46MGYxYjQ2OGItN2UyOC00NzZmLTkwMjYtZDQ5YThhZmYzYWEw","cmF0ZVBsYW46MmM0OTJjODEtYTJiMS00MzE3LTg4NDUtZTkwZjhhZDZjZjc4"] window.jsData.qpageNext = {"related_content_legacy":false}; window.jsData.quickResultsFeatures = {"asking_flow":false,"searching_flow":false,"searching_flow_in_dialog":false,"auto_selection_in_dialog":false,"fuzzy_duplicates":false,"tbs_search_questions":false}; window.jsData.achievementsFeatures = {"subject_name_alternation":true}; window.jsData.leaderboardFeatures = {"leaderboard_spotlight_notification":false,"leaderboard":false}; window.jsData.gtmContainerId = 'GTM-KN3M8C'; window.jsData.flexibleFunnelNameLog = 'F4'; window.jsData.flexibleFunnelNameUnlog = 'F4'; window.jsData.has3dsEnabled = true; window.jsData.hasAccountSettingsPageEnabled = true; window.jsData.hasDidomiCmpEnabled = true; window.jsData.branchIOTactics = {"simple_banner":false,"simple_banner_and_popover":false,"gray_blurred_v1":false,"gray_blurred_v2":false,"gray_blurred_v3":false,"gray_blurred_with_skip":false,"gray_blurred_all_with_skip":false,"gray_blurred_with_skip_and_hard_block":false,"red":false,"programmatic_simple_banner":false,"search_blurred":false}; window.jsData.web2AppSubjectInterstitials = {"math_full_screen":false,"english_full_screen":false,"math_half_screen":false,"english_half_screen":false}; window.jsData.branchIOBudgetLinks = {}; window.jsData.tutoringFeatures = {"url_with_credentials":false,"history":false,"ask_question_flow":false,"answer_banner_entry":false,"chat_banner_entry":false,"verified_answer_box":false,"shared_question_editor":false,"tutoring_ep_answer_content":false,"chat_like_entry_onboarding":false}; window.jsData.hasEmailRegistrationEnabled = true; window.jsData.croTactics = {"has_improved_brainly_plus_promos":false,"has_improved_payments_form":false,"has_mobile_app_landing_page":false,"has_monthly_plans_only":false}; window.jsData.hasSalesElementsHonorCodeLink = true; window.jsData.hasMonetizationLimitationsEnabled = true window.jsData.powerQuestionSupportingAnswerPlaceholders = 5 window.jsData.hasAwarenessModalEnabled = true })();

Помогите пожалуйста, заранее спасибо...

way51 @way51

July 2022 1 10 Report

Помогите пожалуйста, заранее спасибо

Answers & Comments

Pacanka202 ОДЗ: 7-x²≥0 и -6x≥0
x² -7≤0 x≤0
(x-√7)(x+√7)≤0
+ - +
---------- -√7 ------------ √7 -------------
\\\\\\\\\\\\\\\\\\
x∈[-√7; √7]

{x∈[-√7; √7]
{x≤0 ⇒ x∈[-√7; 0]

7-x²= -6x
-x²+6x+7=0
x²-6x-7=0
D=(-6)² -4*(-7)=36+28=64=8²
x₁=(6-8)/2= -2/2= -1
x₂=(6+8)/2=14/2=7∉[-√7; 0] - не корень уравнения.

Проверка корня:
х= -1
√(7-1)=√(-6*(-1))
√6=√6 - верно

Ответ: -1.