Expand
D^{2}+6Da+9a^{2}
Evaluate
\left(D+3a\right)^{2}
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D^{2}+6Da+9a^{2}
Use binomial theorem \left(p+q\right)^{2}=p^{2}+2pq+q^{2} to expand \left(D+3a\right)^{2}.
D^{2}+6Da+9a^{2}
Use binomial theorem \left(p+q\right)^{2}=p^{2}+2pq+q^{2} to expand \left(D+3a\right)^{2}.
Examples
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