Evaluate
r\left(7r^{2}-3r+20\right)
Factor
r\left(7r^{2}-3r+20\right)
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7r^{3}+5r^{2}+11r+9r-8r^{2}
Combine 9r^{3} and -2r^{3} to get 7r^{3}.
7r^{3}+5r^{2}+20r-8r^{2}
Combine 11r and 9r to get 20r.
7r^{3}-3r^{2}+20r
Combine 5r^{2} and -8r^{2} to get -3r^{2}.
r\left(7r^{2}-3r+20\right)
Factor out r. Polynomial 7r^{2}-3r+20 is not factored since it does not have any rational roots.
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