3 2 x + 3*x - 4
x^3 + 3*x^2 - 4
3 2 -4 + x + 3*x
-4 + x^3 + 3*x^2
(x + 2)*(x - 1)
2 -4 + x *(3 + x)
-4 + x^2*(3 + x)
2 (2 + x) *(-1 + x)
(2 + x)^2*(-1 + x)
-4.0 + x^3 + 3.0*x^2