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