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