X 2 x 9 ) ( 7x 2 5 July 8, 2019 16 32 64 128 X 2 x 9 )+( 7x 2 5 2x 3 x 9 )+( 7x 2 5x 2 Find the sum of these polynomials x 2 x 9 )+( 7x 2 5 2 x 3 )+ 7x x 1 )= 5x 2 9 5x 2 x 2 9 x 2 7x 12 9 * (x + 5) ^ 2 - (x - 7) ^ 2 (x - 7) ^ 2 = (9 - x) ^ 2
