Factor
3x^{2}\left(x^{2}+9\right)
Evaluate
3x^{2}\left(x^{2}+9\right)
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3\left(x^{4}+9x^{2}\right)
Factor out 3.
x^{2}\left(x^{2}+9\right)
Consider x^{4}+9x^{2}. Factor out x^{2}.
3x^{2}\left(x^{2}+9\right)
Rewrite the complete factored expression. Polynomial x^{2}+9 is not factored since it does not have any rational roots.
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