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