2x 9 5x 4 7x July 8, 2019 16 32 64 128 5x 9 7x 4 2x 13 5 2x 9 7x 4 5x 2x 3 )( 5x 4 7x 3 6x 2 9 2x 2 5x 3 7x 4 9 2x 7 2x 9 2x+7 9 =5 4 2x 5