18 2 x 9 July 8, 2019 16 32 64 128 18 х 2 9 6x 18 x 2 9 5 18 x 2 9 18 x 2x 9 3 х 18 2 х 9 18 x 2 2x 2 9 X 2 9x 18 X 2 9x 18 0 X 2 9x 18 factor X 2 9x 18 0 quadratic formula A 2 9x 2 18 x - 9 0 X 2 9 18 0 X 2 9x 18 0 completing the square X 2 9x 18 4 18 x 2 90
