4x 2 16x 0 solve July 8, 2019 16 32 64 128 Solve 4x 2 16x 15 0 4x 2 16x 25 0 solve by completing the square Solve 4x 2 16x 8 0 by completing the square Solve 4x 2 16x 7 0 Solve $- 4x 2 16x 20 0 by completing the square 4x4 = 16