4 2 x - 2*x - 3
x^4 - 2*x^2 - 3
/ ___\ / ___\ \x + \/ 3 /*\x - \/ 3 /*(x + I)*(x - I)
(((x + sqrt(3))*(x - sqrt(3)))*(x + i))*(x - i)
4 2 -3 + x - 2*x
-3 + x^4 - 2*x^2
-3.0 + x^4 - 2.0*x^2
2 / 2\ -3 + x *\-2 + x /
-3 + x^2*(-2 + x^2)
/ 2\ / 2\ \1 + x /*\-3 + x /
(1 + x^2)*(-3 + x^2)