2 x - 3*x + 1
x^2 - 3*x + 1
2 1 + x - 3*x
1 + x^2 - 3*x
/ ___\ / ___\ | 3 \/ 5 | | 3 \/ 5 | |x + - - + -----|*|x + - - - -----| \ 2 2 / \ 2 2 /
(x - 3/2 + sqrt(5)/2)*(x - 3/2 - sqrt(5)/2)
1 + x*(-3 + x)
1.0 + x^2 - 3.0*x