Evaluate
\left(7p+2q\right)^{2}
Expand
49p^{2}+28pq+4q^{2}
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49p^{2}+28pq+4q^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(-7p-2q\right)^{2}.
49p^{2}+28pq+4q^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(-7p-2q\right)^{2}.
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