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