1 2x 1 3x 5 6x July 8, 2019 16 32 64 128 1 2x 1 3x 7 5 6x 1 2x 1 3x 1 6x 5 15 2x 1 )( 3x 5 )- 6x x 1 3x 1 5x 3 2x 1 6x 5 2x 1 3x 5 then 5x 6x 2 20x 1