Evaluate
27\left(-b-1\right)^{3}
Expand
-27b^{3}-81b^{2}-81b-27
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-27-81b-81b^{2}-27b^{3}
Use binomial theorem \left(p-q\right)^{3}=p^{3}-3p^{2}q+3pq^{2}-q^{3} to expand \left(-3-3b\right)^{3}.
-27-81b-81b^{2}-27b^{3}
Use binomial theorem \left(p-q\right)^{3}=p^{3}-3p^{2}q+3pq^{2}-q^{3} to expand \left(-3-3b\right)^{3}.
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