4x 2 2x 1 9 3x July 8, 2019 16 32 64 128 4x 2 9 =( 3x 1 )( 2x 3 4x 3x 9 x 2 2x 1 4x 6x 2 9 )( 3x 2 2x 1 2x 4x 2 6x 2 9 1 x 3x
