Question 166305
(x+6)^2 = 121

(x+6)^2 = 11^2

Apply square root on both sides. So, square and square root will be canceled.

x+6 = 11 or x+6 = -11

x+6-6 = 11-6  or x+6-6 = -11-6

x = 5 or x = -17