Предмет: Алгебра, автор: husaneriell5

(-a-b-c)² возвести в квадрат трёхчлена​

Ответы

Автор ответа: VlaDikantro
1

Используя (a+b+c)^2=a^2+b^2+c^2+2ab+2ac+2bc записать выражение в развёрнутом виде: (-a)^2+(-b)^2+(-c)^2+2*(-a)*(-b)+2*(-a)*(-c)+2*(-b)*(-c)=a^2+b^2+c^2+2ab+2ac+2bc

Ответ: a^2+b^2+c^2+2ab+2ac+2bc

husaneriell5: спасибо
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