Show that (5x−3)(x+2)(2x−1)=10x3+9x2−19x+6(5x - 3)(x + 2)(2x - 1) = 10x^3 + 9x^2 - 19x + 6(5x−3)(x+2)(2x−1)=10x3+9x2−19x+6 for all values of xxx.