Предмет: Алгебра, автор: bebik07

Докажите тождества
(a+b)^2-4ab=(a-b)^2
(a-b)^2+4ab=(a+b)^2

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Автор ответа: manyny06

0

решение смотри на фотографии

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Автор ответа: ok6210

0

a^2+2ab-b^2-4ab=a^2-2ab+b^2=(a-b)^2
a^2-2ab+b^2+4ab=a^+2ab+b^2=(a+b)^2

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