Автор - taradanova16

(2а-11)(11+2а)-(2а-5)в квадрате =0
решите уравнение

Ответ

Автор - michindjeva

4 {a}^{2}  - 121 - 4 {a}^{2}  + 20a - 25 = 0 \ 20a = 146 \ a = 146 div 20 \ a = 7.3

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