Answer:
x = 3 ±√5
Explanation:
We can take the square root of both sides of the equation:
(x -3)^2 = 5 . . . . . . . . given
x -3 = ±√5 . . . . . . . . square root
x = 3 ±√5 . . . . . . . . add 3
_____
Additional comment
It is a good idea to remember this process. It is the final step in solving a quadratic by "completing the square."