Предмет: Алгебра, автор: kovenko20031

Используя формулы сокращ.умножения,упростите выражение:(x+2y)^2-(x-2y)^2

Ответы

Автор ответа: KroKOzYabRIKs

(x^2+4xy+4y^2)-(x^2-4xy+4y^2)=x^2+4xy+4y^2-x^2+4xy-4y^2=8xy

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