Автор - nicevita

Реши уравнение:
x^2+18x+56=0

Ответ

Автор - яВиктория
D= 324-4*56=324-224 = 100 = 10*10
х1= (-18+10)/2 = -8/2 = -4
х2 = (-18-10)/2 = -28/2 = -14

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