C-03-Q158mediumsingle_mcqFactorize 18x3+15x2−x−218x^3 + 15x^2 - x - 218x3+15x2−x−2:a(3x−1)(3x+2)(2x+1)(3x-1)(3x+2)(2x+1)(3x−1)(3x+2)(2x+1)b