September 2021 0 34 Report
Верно ли равенство? а) 7а + 5 = 5 + 7а;
б) (7а + 5)^2 = (5 + 7а)^2;
в) 7а – 5 = 5 – 7а;
г) (7а – 5)^2 = (5 – 7а^)2.


^2- квадрат(степень)
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