Question

x ao quadrado - 2x = -1 ​

Answer 1

Resposta:

${x}^{2} - 2x + 1 = 0 \\ a )1\: \: \: \: b) - 2 \: \: \: \: c = 1 \\ \ delta = {b}^{2} - 4.a.c = \\ \\ delta = {( - 2)}^{2} - 4.1.1 \\ delta = 4 - 4 \\ delta = 0 \\ x = \frac{ 2}{2} = > x = 1$