Предмет: Алгебра, автор: фбвгдеёжка13

Упростите выражение 3х (х + у + с) - 3у (х - у - с) - 3с (х + у - с).

Ответы

Автор ответа: Rechnung

0

3x(x+y+c)-3y(x-y-c)-3c(x+y-c)=
=3x²+3xy+3xc-3xy+3y²+3yc-3xc-3yc+3c²=
=3x²+3y²+3c²=3(x²+y²+c²)

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