Factor
\left(5u+4\right)\left(4u^{2}+7\right)
Evaluate
\left(5u+4\right)\left(4u^{2}+7\right)
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4u^{2}\left(5u+4\right)+7\left(5u+4\right)
Do the grouping 20u^{3}+16u^{2}+35u+28=\left(20u^{3}+16u^{2}\right)+\left(35u+28\right), and factor out 4u^{2} in the first and 7 in the second group.
\left(5u+4\right)\left(4u^{2}+7\right)
Factor out common term 5u+4 by using distributive property. Polynomial 4u^{2}+7 is not factored since it does not have any rational roots.
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