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Автор - 1224566789

помогите пожалуйста номер 1 и 2 решение!!!​

Ответ

Автор - umatovgasan

Формулы:

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

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

Примеры:

(4+а)^2=4^2+2*4*а+а^2=16+8а+а^2

(/3х-/2у)^2=(/3х)^2-2*/3х*/2у+(/2у)^2=3х-2/6ху+2у

Остальные аналогично!

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