2 9 x 72 July 8, 2019 16 32 64 128 2 9 x 72 1 12 2 9 x 720 1 9 2 x 729 9 x 3 2x 2 72 2 x )( 9x 72 )= 0 2 over 9 x 72 9 2y 2 x 72 9 x 2 720 9x 9 5 x 72 2 2 5x 1 )-( x 9 2 72