Home
О нас
Products
Services
Регистрация
Войти
Поиск
MarieSwan
@MarieSwan
July 2022
1
7
Report
20 баллов. Алгебра, 8 класс. Задания на картинке. С решением! 7 задание не обязательно
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
oganesbagoyan
Verified answer
4. (2y -5)/(y+5) = (3y+21)/(2y -1);
ОДЗ : { y ≠ -5 ; y ≠ 1/2.
(2y -5)(2y -1)=(3y+21)(y+5) ;
4y² -12y +5 =3y² +36y +105 ;
y² -48y -100=0 ; D/4 =(48/2)² -(-100) =676 =26²
y₁ =24 -26 = -2 ;
y
₂ =24 +26 =50 .
(y₁+y₂) / 2 =(-2+50)/2 = 24
ответ: Г)24
-----
5.
(3x² -5x -2) /( 2 -x) =0 ;
ОДЗ : x≠2.
3x² -5x -2 =0 ; D =5² -4*3(-2) =49=7² ;
x₁ =(5+7)/ (2*3 ) =2 ∉ ОДЗ
x₂ =(5-7)/ 6 = -1/3
ответ: Г) -1/3
---
6. (a-14) / (a³ -8) = 5/ (a²+2a+4) -1/(a-2) ;
* * * a³ -8 =a³ -2³ =(a - 2)(a²+2a+4) * * *
ОДЗ : x≠2.
a-14 = 5(a-2) - (a²+2a+4) ;
a-14 = 5a-10 - a²-2a-4 ;
a² -2a =0 ;
a(a-2) =0 ;
a =2 ∉ ОДЗ ;
ответ: a=0.
2 votes
Thanks 1
More Questions From This User
See All
MarieSwan
August 2022 | 0 Ответы
dayu 20 ballovpomogite tolko pravilno pozhalujstaa10087cb8908cbb7b08c7ab133aec4d8 53288
Answer
MarieSwan
August 2022 | 0 Ответы
dayu 20 ballov reshite uravneniya tolko pravilno i s resheniem
Answer
MarieSwan
August 2022 | 0 Ответы
dayu 20 ballovpomogite tolko pravilno pozhalujsta18491877f7012b9d1b984c860808d011 21355
Answer
MarieSwan
August 2022 | 0 Ответы
pomogite kakoe iz uravnenij ne imeet kornej08cae2fc7532d0dac018f11d5f23b49b 6227
Answer
MarieSwan
August 2022 | 0 Ответы
12 ballov himiya 8 klass zadanie na kartinke pomogite pozhalujsta tolko prav
Answer
MarieSwan
August 2022 | 0 Ответы
pomogite kakoe iz uravnenij ne imeet kornej
Answer
MarieSwan
August 2022 | 0 Ответы
dayu 20 ballovpomogite tolko pravilno pozhalujsta
Answer
MarieSwan
August 2022 | 0 Ответы
pomogite ya ne ponimayu prosto
Answer
MarieSwan
July 2022 | 0 Ответы
ustanovite sootvetstvie mezhdu raspredeleniem elektronov po sloyam v atome himiches
Answer
MarieSwan
July 2022 | 0 Ответы
pomogite dayu 20 ballov tolko pravilno
Answer
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 "20 баллов. Алгебра, 8 класс. Задания на картинке. С решением! 7 задание не обяза..."
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
4. (2y -5)/(y+5) = (3y+21)/(2y -1);ОДЗ : { y ≠ -5 ; y ≠ 1/2.
(2y -5)(2y -1)=(3y+21)(y+5) ;
4y² -12y +5 =3y² +36y +105 ;
y² -48y -100=0 ; D/4 =(48/2)² -(-100) =676 =26²
y₁ =24 -26 = -2 ;
y₂ =24 +26 =50 .
(y₁+y₂) / 2 =(-2+50)/2 = 24
ответ: Г)24
-----
5.
(3x² -5x -2) /( 2 -x) =0 ;
ОДЗ : x≠2.
3x² -5x -2 =0 ; D =5² -4*3(-2) =49=7² ;
x₁ =(5+7)/ (2*3 ) =2 ∉ ОДЗ
x₂ =(5-7)/ 6 = -1/3
ответ: Г) -1/3
---
6. (a-14) / (a³ -8) = 5/ (a²+2a+4) -1/(a-2) ;
* * * a³ -8 =a³ -2³ =(a - 2)(a²+2a+4) * * *
ОДЗ : x≠2.
a-14 = 5(a-2) - (a²+2a+4) ;
a-14 = 5a-10 - a²-2a-4 ;
a² -2a =0 ;
a(a-2) =0 ;
a =2 ∉ ОДЗ ;
ответ: a=0.