Solve x 4 x 2 12 0 July 8, 2019 16 32 64 128 Solve x 2 4x 12 0 Solve x 4 4x 2 12 0 Solve x 4 7x 2 12 0 Solve x 2 4x 12 0 by completing the square Solve x 2 4x 12 0 using quadratic formula Solve x 2 4x 12 0 by factoring 4 + 4 = 12 Solve 4x ^ 2 - 5x - 12 = 0