Автор - waieqtksh

сократите дробь и найдите ее значение при х=-3

Ответ

Автор - сок111213

 frac{x {}^{2}  - 5x + 4 }{x - 4}  =  frac{x {}^{2}  - x - 4 x+ 4}{x - 4}  =  frac{x(x - 1) - 4(x - 1)}{x - 4}  =  frac{(x - 1)(x - 4)}{x - 4}  = x - 1 =  - 3 - 1 =  - 4

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