Question

X - 2x + 1 =0 o descriminante

Answer 1

$x-2x + 1 = 0\\-x + 1 = 0$

$-x + 1 = 0\\-x + 1-1 = 0 -1$

$-x = -1$

$-x = -1 \\-\frac{x}{-1} = \frac{-1}{-1}$

$x = 1$