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Автор - Linnikartem20011

(X+3)^2-x^2+6x
упростите выражение.

Ответ

Проверено экспертом

Автор - byzhesenli
x^2+2×x×3+3^2-x^2+6x=x^2+6x+9-x^2+6x=12x+9.

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