Evaluate
\left(\frac{n}{5}+8m\right)^{2}
Expand
\frac{16mn}{5}+\frac{n^{2}}{25}+64m^{2}
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64m^{2}+3.2mn+0.04n^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(-8m-0.2n\right)^{2}.
64m^{2}+3.2mn+0.04n^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(-8m-0.2n\right)^{2}.
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