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