doughnot555 doughnot555 15-09-2022 Mathematics contestada Use the grouping method to factor the polynomial below completely. 3x³ +9x² +5x+15 O A. (3x²+5)(x+3) OB. (3x²+3)(x + 5) O C. (3x²+5)(x+5) OD. (3x²+3)(x+3)