Question

Решите уравнение.
(x-1)(x+1)-x(x-2)=0

Answer 1

${x}^{2} + x - x - 1 - {x}^{2} + 2x = 0 \\ 2x - 1 = 0 \\ 2x = 1 \\ x = 0.5$

Answer 2

$(x-1)*(x+1)-x*(x-2)=0 \\x ^{2}-1-x ^{2}+2x=0 \\-1+2x=0 \\2x=1:2 \\x= \frac{1}{2}=0.5$