Question

Помогите √x-5=x-7
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Answer 1

x-5=x^2-14x+49

x-5-x^2+14x-49=0

-x^2+15x-54=0

x^2-15x+54=0

x1=9
x2=6

проверку
2=2    1=-1

x=9
x=- неравен 6

Answer 2

спасибо