Solve 4x 2 20 0 July 8, 2019 16 32 64 128 Solve 4x 2 11x 20 0 Solve $- 4x 2 16x 20 0 by completing the square Solve x 2 4x 20 0 Solve $- 2x 2 4x 20 0 by completing the square Solve x 3 5x 2 4x 20 0 Solve 3x 2 4x 20 3 0 Solve the equation x 3 5x 2 4x 20 0