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