Question

решите уравнение (х-1)(х+1)-х(x-2)=0

Answer 1

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Answer 2

x^2 - x^2 - x^2 + 2x = 0
-x^2 + 2x = 0
x^2 + 2x = 0
x(x+2) = 0
x1 = 0
x2 = -2