Home
О нас
Products
Services
Регистрация
Войти
Поиск
щдуышф
@щдуышф
July 2022
2
1
Report
9x²+6x+1=0
3x(4-7x)-(7x-4)=0
алгебра 7 класс помогите пж
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms of service
You must agree before submitting.
Send
Answers & Comments
Санечка69
Verified answer
9x² + 6x + 1 = 0
нужно увидеть формулу квадрата суммы (a + b)
² = a² + 2ab + b².
(3х + 1)
² = 0
3х + 1 = 0
3х = -1
х = -1/3
3x(4 - 7x) - (7x - 4) = 0
3х(4 - 7х) + (4 - 7х) = 0
(4 - 7х)(3х + 1) = 0
4 - 7х = 0 или 3х + 1 = 0
-7х = -4 3х = -1
х = 4/7 х = -1/3
2 votes
Thanks 1
Valakott
1)D= 36-36=0
x= -6 ÷ 18 ~ -0,33
2) 12x-21x^2-7x+4=0
-21x^2+5x+4=0 | ×(-1)
21x^2-5x-4=0
D= 25+336=361=19^2
x1= 5+19
------- ~ 0.57
42
x2= 5-19
------- ~ -0.33
42
0 votes
Thanks 0
рекомендуемые вопросы
rarrrrrrrr
August 2022 | 0 Ответы
o chem dolzhny pozabotitsya v pervuyu ochered vzroslye pri organizacionnom vyvoze n
danilarsentev
August 2022 | 0 Ответы
est dva stanka na kotoryh vypuskayut odinakovye zapchasti odin proizvodit a zapcha
myachina8
August 2022 | 0 Ответы
najti po grafiku otnoshenie v3v1 v otvetah napisano 9 no nuzhno reshenie
ydpmn7cn6w
August 2022 | 0 Ответы
Choose the correct preposition: 1.I am fond (out,of,from) literature. 2.where ar...
millermilena658
August 2022 | 0 Ответы
opredelite kak sozdavalas i kto sozdaval arabskoe gosudarstvo v kracii
MrZooM222
August 2022 | 0 Ответы
ch ajtmanov v rasskaze krasnoe yabloko ispolzuet metod rasskaz v rasskaze opi
timobila47
August 2022 | 0 Ответы
kakovo bylo naznachenie kazhdoj iz chastej vizantijskogo hrama pomogite pozhalujsta
ivanyyaremkiv
August 2022 | 0 Ответы
moment. 6....
pozhalujsta8b98a56c0152a07b8f4cbcd89aa2f01e 97513
sarvinozwakirjanova
August 2022 | 0 Ответы
pomogite pozhalusto pzha519d7eb8246a08ab0df06cc59e9dedb 6631
×
Report "9x²+6x+1=0 3x(4-7x)-(7x-4)=0 алгебра 7 класс помогите пж..."
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
О нас
Политика конфиденциальности
Правила и условия
Copyright
Контакты
Helpful Social
Get monthly updates
Submit
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
9x² + 6x + 1 = 0нужно увидеть формулу квадрата суммы (a + b)² = a² + 2ab + b².
(3х + 1)² = 0
3х + 1 = 0
3х = -1
х = -1/3
3x(4 - 7x) - (7x - 4) = 0
3х(4 - 7х) + (4 - 7х) = 0
(4 - 7х)(3х + 1) = 0
4 - 7х = 0 или 3х + 1 = 0
-7х = -4 3х = -1
х = 4/7 х = -1/3
x= -6 ÷ 18 ~ -0,33
2) 12x-21x^2-7x+4=0
-21x^2+5x+4=0 | ×(-1)
21x^2-5x-4=0
D= 25+336=361=19^2
x1= 5+19
------- ~ 0.57
42
x2= 5-19
------- ~ -0.33
42