Автор - poberezhnaolga7

(x+7)2-(x+7)(x-5)+(x-5)2 якщоx=3,5

Ответ

Автор - sofuzka989
(x+7)*2-(x+7)*(x-5)*2 при x=3,5
(3,5+7)*2-(3,5+7)*(3,5-5)*2
21-178,5=157, 5

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