2 -4 - 3*x
-4 - 3*x^2
/ ___\ / ___\ | 2*I*\/ 3 | | 2*I*\/ 3 | |x + ---------|*|x - ---------| \ 3 / \ 3 /
(x + 2*i*sqrt(3)/3)*(x - 2*i*sqrt(3)/3)
-4.0 - 3.0*x^2