12. What are the factors of xy + 2y + 3x + 6? A. (y + 2)(x+3) C. (y + 3)(x + 2) B. (y - 3)(x + 2) D. (y-2)(x + 3) 13. What are the factors of 4x3 + 2x2 - 2x - 1? A. (2x2 + 1)(2x + 1) C. (2x2 + 1)(2x - 1) B. (2x2 - 2)(2x + 1) D. (2x2 - 1)(2x + 1) 14. What are the complete of 2x3 - 3x2 - 2x + 3? A. (x - 1)(x + 1)(2x - 3) C. (x2 - 1) (2x - 3) B. (x2 + 1)(2x - 3) D. (2x - 3)(2x + 3)(x - 1) 15. What are the factors of 9x3 + 36x2 - 4x - 16? A. (x-2)(x + 2)(3x + 4) C. (3x-2)(3x + 2)(x + 4) B. (9x2 + 4)(x - 4) D. (9x2 - 4)(x + 4) 11 49