2 2*x - 4*x + 5
2*x^2 - 4*x + 5
/ ___\ / ___\ | I*\/ 6 | | I*\/ 6 | |x + -1 + -------|*|x + -1 - -------| \ 2 / \ 2 /
(x - 1 + i*sqrt(6)/2)*(x - 1 - i*sqrt(6)/2)
2 5 - 4*x + 2*x
5 - 4*x + 2*x^2
5.0 + 2.0*x^2 - 4.0*x
5 + 2*x*(-2 + x)