5x 1 )( x 3 )-( x 2 )( 5x 4 July 8, 2019 16 32 64 128 X 4 1 x 4 5x 3 5x 2 5x 6 hcf Gcd of x 4 1 x 4 5x 3 5x 2 5x 6 5 x 5 x 5 x 5 x 5