Предмет: Алгебра, автор: p6132015

докажите тождество (a+b)^2-2(a+b)(a-b)+(a-b)=4b^2

Ответы

Автор ответа: mistuknasta00

0

Ответ:

(a+b)²-(a-b)²=a²+2ab+b²-a²+2ab-b²=4ab

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