10x 2 9x (- 4x 1 July 8, 2019 16 32 64 128 10x 2 3 )-( 9x 2 4x 1 Subtract 10x 2 3 from 9x 2 4x 1 10x 10 9x 7 4x 2 4x 3 9x 2 10x 15
