9 2x 5 27 July 8, 2019 16 32 64 128 9 2x 5 27 x 9 5 2x 2 27 28 9 3x =( 27 2x 5 14 9 2x 5 3 2.5 27 9 2x 27 x 2 5 9 2x 3 27 x 5 42 5 2x 9 )= 27 2x 9 9−25x 2 2x 5