Question

× ao quadrado + 2 × +1 =0

Answer 1

x²+2x+ 1=0 
= 2x³+ 1=0

Answer 2

Olá!!!

x² + 2x + 1 = 0

a= 1
b= 2
c= 1

▲ = b² - 4ac
▲ = 2² - 4 • 1 • 1
▲ = 4 - 4
▲ = 0

x = - b ± √▲ / 2a
x = - 2 ± √0 / 2 • 1
x = - 2 ± 0 / 2
x' = - 2 + 0 / 2 = - 2 / 2 = - 1
x" = - 2 - 0 / 2 = - 2 / 2 = - 1

S = { - 1 , - 1 }

bons estudos...