Evaluate
\left(\frac{q}{2}+\frac{2p}{5}\right)^{2}
Expand
\frac{2pq}{5}+\frac{4p^{2}}{25}+\frac{q^{2}}{4}
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0.16p^{2}+0.4pq+0.25q^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(0.4p+0.5q\right)^{2}.
0.16p^{2}+0.4pq+0.25q^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(0.4p+0.5q\right)^{2}.
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