A 2x 3 b 3x 4 x 7 6x 2 x 12 July 8, 2019 16 32 64 128 A) 2x(x ^ 2 - 7x - 3) 6) - 4b ^ 2 * (5b ^ 2 - 3b - 2) b) (3a ^ 3 - a ^ 2 + a)(- 5a ^ 3)