2 3*x x - --- 2
x^2 - 3*x/2
x*(-3 + 2*x) ------------ 2
x*(-3 + 2*x)/2
x*(x - 3/2)
x^2 - 1.5*x
2 -3*x + 2*x ----------- 2
(-3*x + 2*x^2)/2