Question

${x}^{2} + 2x + 1 = 0$

Answer 1

Muito fácil.

$x {}^{2} + 2x + 1 = 0 \\ (x + 1) {}^{2} = 0 \\ x + 1 = 0 \\ \\ x = - 1$
Bons estudos!

Answer 2

x² + 2x + 1 = 0

∆= 2² - 4 • 1 • 1
∆= 4 - 4
∆= 0

x= - 2 ± √0 /2 • 1
x= - 2 ± 0/2

x'= - 2 + 0/2 = - 1
x"= - 2 - 0/2 = - 1

S= ( - 1)