9x 2 x 7 0 July 8, 2019 16 32 64 128 9x 2 2x 7 0 X 3 9x 2 15x 7 0 X 3 3x 2 9x 7 0 X 2 9x 7 0 complete the square Solve x 2 9x 7 0 Solve for x 2x 2 9x 7 0 2x 9