X ∙ 5 4x−1 ∙ 25−2 July 8, 2019 16 32 64 128 X * 5 4x 1 * 25 2x X 5 )( 4x 1 )+ x 2 25 0 25 1 2 x 5 )( 4x 6 4x 1 )( x 5 )= x 2 25