Factor
\left(x+3\right)\left(3x^{2}+1\right)
Evaluate
\left(x+3\right)\left(3x^{2}+1\right)
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3x^{2}\left(x+3\right)+x+3
Do the grouping 3x^{3}+9x^{2}+x+3=\left(3x^{3}+9x^{2}\right)+\left(x+3\right), and factor out 3x^{2} in 3x^{3}+9x^{2}.
\left(x+3\right)\left(3x^{2}+1\right)
Factor out common term x+3 by using distributive property. Polynomial 3x^{2}+1 is not factored since it does not have any rational roots.
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