Express −5+6x2+20x(3x−1)(x+2)\displaystyle \frac{-5+6x^2+20x}{(3x-1)(x+2)}(3x−1)(x+2)−5+6x2+20x in the form A+B3x−1+Cx+2\displaystyle A + \frac{B}{3x-1} + \frac{C}{x+2}A+3x−1B+x+2C
