Question

Решите уравнение (x-2)²-(x-1)(x+1)=0

Answer 1

${x}^{2} - 4x + 4 - {x}^{2} + 1 = 0 \\ - 4x + 5 = 0 \\ - 4x = - 5 \\ x = \frac{5}{4} = 1 \frac{1}{4}$