2 - x + x - 2
-x^2 + x - 2
2 -2 + x - x
-2 + x - 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 + x*(1 - x)
-2.0 + x - x^2