0 x 2 9x 22 July 8, 2019 16 32 64 128 X 2 9x 220 0 Hence solve x 2 9x 22 0 X 4 9x 2 22 0 X 2 9x 22 0 complete the square X 2 9x 22 0 quadratic formula X 2 9x 22 0 positive solution 0 x 2 2x 9 2 x 0 9