2 x 2 9x July 8, 2019 16 32 64 128 2 x 2 9x 18 2 x 2 9x 10 0 2 2x 2 9x X 2 9x 2 factor X 2 x 2 9x 3 X 2 (- 2x 2 9x X 2 9x 2 20 0 X 2 (- 9x 2 1 X 2 9x 2 5 X 2 x 2 )- 9x 18 0 2x 2 9x 2 =- 6 2x 2 9x 2 =- 1 7x 2 x )-( 9x 2 4x X 2 3x 2 9x 5 X 2 2 4 9x