5 3 2 x - x + x - 1
x^5 - x^3 + x^2 - 1
/ ___\ / ___\ | 1 I*\/ 3 | | 1 I*\/ 3 | (x + 1)*(x - 1)*|x + - - + -------|*|x + - - - -------| \ 2 2 / \ 2 2 /
(((x + 1)*(x - 1))*(x - 1/2 + i*sqrt(3)/2))*(x - 1/2 - i*sqrt(3)/2)
2 5 3 -1 + x + x - x
-1 + x^2 + x^5 - x^3
2 / / 2\\ -1 + x *\1 + x*\-1 + x //
-1 + x^2*(1 + x*(-1 + x^2))
2 / 2 \ (1 + x) *(-1 + x)*\1 + x - x/
(1 + x)^2*(-1 + x)*(1 + x^2 - x)
-1.0 + x^2 + x^5 - x^3