Evaluate
\left(2v+9w\right)^{2}
Expand
4v^{2}+36vw+81w^{2}
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81w^{2}+36wv+4v^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(9w+2v\right)^{2}.
81w^{2}+36wv+4v^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(9w+2v\right)^{2}.
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