Starygamergirl13 Starygamergirl13 18-03-2019 Mathematics contestada Determine whether the polynomial (2x-3)(7x+21) is completely factored or not. If not, factor the polynomial. A. completely factored B. 3(2x-1)(x+7) C. 7(2x-3)(x+3) D. 7(2x-3)(x-3)