Предмет: Алгебра, автор: SFRfrScRSvsrCS

Решите любое даю 20 баллов

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Ответы

Автор ответа: MrFierMag

4.
6-10y+1=4-4y
-10y+4y=4-6
-6y=-2
y=-2:(-6)
y=-2/6=-1/3
ответ:-1/3
кажется так

Автор ответа: karina31rus1

2) а^2+2аб+б^2-4аб=(а-б)^2
А^2-2аб+б^2=(а-б)^2
(А-б)^2=(а-б)^2
Доказано

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