which shows one way to determine the factors of 12x^3 - 2x^2 + 18x - 3 by grouping? A) 2x^2(6x - 1) + 3(6x - 1) B) 2x^2(6x - 1) - 3(6x - 1) C) 6x(2x^2 - 3) - 1(2x^2 - 3) D) 6x(2x^2 + 3) + 1(2x^2 + 3)