Question

Resolva: $4=(x-2)^2$

Answer 1

$4 = {(x - 2)}^{2} \\ \sqrt{4} = \sqrt{ {(x - 2)}^{2} } \\ 2 = |x - 2| \\ \\ x - 2 = 2 \: \: \: (1) \:ou \: \: x - 2 = - 2 \: \: \: (2) \\ \\ (1) \: x - 2 = 2 \\ x = 2 + 2 \\ x = 4 \\ \\ (2) \: x - 2 = - 2 \\ x = - 2 + 2 \\ x = 0$


S = {0, 4}