2 x + x + 2
x^2 + x + 2
/ ___\ / ___\ | 1 I*\/ 7 | | 1 I*\/ 7 | |x + - + -------|*|x + - - -------| \ 2 2 / \ 2 2 /
(x + 1/2 + i*sqrt(7)/2)*(x + 1/2 - i*sqrt(7)/2)
2 2 + x + x
2 + x + x^2
2.0 + x + x^2
2 + x*(1 + x)