4 2 x - 6*x + 5
x^4 - 6*x^2 + 5
/ ___\ / ___\ (x + 1)*(x - 1)*\x + \/ 5 /*\x - \/ 5 /
(((x + 1)*(x - 1))*(x + sqrt(5)))*(x - sqrt(5))
4 2 5 + x - 6*x
5 + x^4 - 6*x^2
2 / 2\ 5 + x *\-6 + x /
5 + x^2*(-6 + x^2)
5.0 + x^4 - 6.0*x^2
/ 2\ (1 + x)*(-1 + x)*\-5 + x /
(1 + x)*(-1 + x)*(-5 + x^2)