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