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Factor polynomial x^4+x^2

An expression to simplify:

The solution

You have entered [src]
 4    2
x  + x 
$$x^{4} + x^{2}$$
x^4 + x^2
Factorization [src]
x*(x + I)*(x - I)
$$x \left(x + i\right) \left(x - i\right)$$
(x*(x + i))*(x - i)
Numerical answer [src]
x^2 + x^4
x^2 + x^4
Combining rational expressions [src]
 2 /     2\
x *\1 + x /
$$x^{2} \left(x^{2} + 1\right)$$
x^2*(1 + x^2)
Combinatorics [src]
 2 /     2\
x *\1 + x /
$$x^{2} \left(x^{2} + 1\right)$$
x^2*(1 + x^2)