Предмет: Математика, автор: 51maxim51

раскройте скобки -(2а-в+с)

Ответы

Автор ответа: Milelins

-2a+b-c
если перед скобками стоит минус - все знаки в скобках меняются на противоположные.

Автор ответа: julyap

$-(2a-b+c)=-2a+b-c=b-2a-c$

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