mhyix34 mhyix34 24-02-2021 Mathematics contestada Use the grouping method to factor 2x3 + 6x2 - 7x- 21. O A. (x - 3)(x + 7) O B. (x+3)(2x2 - 7) C. 2x(x + 3)(x - 7) O D. (x - 3)(2x2 + 7)