4x 2 4x 1 x 2 2x 1 July 8, 2019 16 32 64 128 (- 3x 2 4x 1 )( x 2 2x 1 2x 4 4x 3 3x 2 4x 1 x 2 1 18 4x 2 4x 1 1 2x 2 x 6 4x 2 1 4x x 2 4x 3 1 6 1 x 3 1 2x 2 4x 3 x 2 4x 1 x 2 2x 15
