2x 4 9x 2 7 July 8, 2019 16 32 64 128 Y 2x 4 9x 2 7 8x 4 9x 2 2x 7 4 2x 3 )- 7 9x 2 9x 2 2x 7 )( x 4 2x 4 7x 3 9x 2 7x 2 0 2x 2 7xy 3y 2 9x 7y 4 2x 7x 4 )-( 6x 9x 2 8x 4 2x 9
