4 2 x + 10*x + 9
x^4 + 10*x^2 + 9
4 2 9 + x + 10*x
9 + x^4 + 10*x^2
(x + 3*I)*(x + I)*(x - I)*(x - 3*I)
(((x + 3*i)*(x + i))*(x - i))*(x - 3*i)
9.0 + x^4 + 10.0*x^2
2 / 2\ 9 + x *\10 + x /
9 + x^2*(10 + x^2)
/ 2\ / 2\ \1 + x /*\9 + x /
(1 + x^2)*(9 + x^2)