Question

Resolva a equaçao x²-2x+1=0

Answer 1

x² - 2x + 1 = (x-1)² = (x-1)(x-1)

(x-1)(x-1) = 0
x-1 = 0(x-1)
x-1 = 0
x = 1

(x-1)(x-1) = 0
x-1 = 0(x-1)
x-1 = 0
x = 1

S = {1}