Предмет: Алгебра, автор: annatatcin8

a) (б-c)²; б) (2a+7)²​

Ответы

Автор ответа: sveta19977778
0

Ответ:

1)(b - c )^{2} = {b}^{2} - 2bc + {c}^{2} \\ 2)(2a + 7) ^{2} = 4 {a}^{2} + 28a + 49

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