November 2021 0 8 Report
Помогите пожалуйста решить мне очень нужно 31.5 Вычислите с помощью формулы а^2-b^2=(а-b)(a+b)
1) 13^2-9^2;
3) 2,2^2-2,8^2
5) (5/6)^2-(2/3)^2
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