Solve x 2 4x 9 0 July 8, 2019 16 32 64 128 Solve x 2 4x 9 0 by completing the square Solve x 2 4x 9 0 by using the quadratic formula Solve the quadratic equation x 2 4x 9 0 Solve for x 4x 2 12x 9 0 Solve x 4 4x 3 2x 2 12x 9 0 Solve the quadratic equation by completing the square x 2 4x 9 0 Solve (4x – 5)2 = 9