Evaluate
9\left(2m+n\right)^{2}
Expand
36m^{2}+36mn+9n^{2}
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36m^{2}+36mn+9n^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(6m+3n\right)^{2}.
36m^{2}+36mn+9n^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(6m+3n\right)^{2}.
Examples
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