Solve the equation: the square of (2x-1) - 4 = 0

Solve the equation: the square of (2x-1) - 4 = 0

(2x-1)^2=4
2x-1 = 2 or - 2
When 2x-1 = 2
2x=3
x=3/2
When 2x-1 = - 2
2x=-1
x=-1/2