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