Select the correct answer.
Solve the following equation by completing the square.
1 + 2 + = 0
OA. z=2+ √√3 or 2 = 2√3
OB. 2=-2+ √3 or z = -2- √3
O c. x = 1 or = -5
OD. 2 = 2 + √√3 or z = 2√3