2 1 + 3*x
1 + 3*x^2
/ ___\ / ___\ | I*\/ 3 | | I*\/ 3 | |x + -------|*|x - -------| \ 3 / \ 3 /
(x + i*sqrt(3)/3)*(x - i*sqrt(3)/3)
1.0 + 3.0*x^2