Solve the question by completing the sqaure x² + 4x = 0?

x = 0 or - 4

Step-by-step explanation:

x² + 4x = 0

To complete the square, take half of the middle coefficient, square it, then add to both sides.

(4/2) ² = 2² = 4

x² + 4x + 4 = 4

(x + 2) ² = 4

x + 2 = ±2

x = - 2 ± 2

x = 0 or - 4