(x - 3) 2 = 5

 (x - 3) 2 = 5   simplify

3x - 6   = 5      add 6 to both sides

3x = 11   divide both sides by 3

x = 11 / 3

(x - 3) 2 = 5

We get rid of the bracket, and we get:

2x - 6=5 We move to the right hand side and change its sign from -6 to +6

2x=5 + 6

2x=11 Now we divide both sides by 2 and we get

x=11/2=5 1/2

CPhill made a small mistake by taking "3x" instead of "2x"