Предмет: Алгебра, автор: SofiaSofia7

Является ли выражение (а+б)+с тождественным выражению а-(-б-с)
Помогите пожалуйста с алгеброй

Ответы

Автор ответа: Аноним
0

А давайте проверим?

раскроем скобки во втором и сравним с первым.

а-(-b-с)=a+b+c

равно первому. Да. является тождественным

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