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49y^{2}+112y+64
Evaluate
\left(7y+8\right)^{2}
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49y^{2}+112y+64
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(7y+8\right)^{2}.
49y^{2}+112y+64
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(7y+8\right)^{2}.
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