Question

(x-5)^2=81, solve for x

Answer 1

x ∈ {-4, 14}

Explanation:

Take the square root and add 5.

(x -5) = ±√81 = ±9

x = 5 ± 9

x ∈ {-4, 14} . . . . . . x may be either of -4 or 14