Question

X2-2x+1=0 (X2= X ao quadrado)

Answer 1

x²-2x+1 = 0

a = 1
b = -2
c = 1

Δ = b²-4.a.c
Δ = (-2)²-4.1.1
Δ = 4-4
Δ = 0

x = -b ⁺₋ √Δ / 2.a
x = 4 ⁺₋ 0 / 2

x' = 4/2 = 2

x'' = 4/2 = 2

Espero ter ajudado.

Answer 2

x² - 2x + 1 = 0

a = 1; b = -2; c = 1

x = [- b ± √(b² - 4ac)] / 2a
x = [- (-2) ± √([-2]² - 4 · 1 · 1)] / 2 · 1
x = [2 ± √(4 - 4)] / 2
x = [2 ± √0] / 2
x = [2 ± 0] / 2
x' = [2 + 0] / 2 = 2 / 2 = 1
x'' = [2 - 0] / 2 = 2 / 2 = 1

Espero ter ajudado. Valeu!