Evaluate
\left(4y+1\right)^{2}
Expand
16y^{2}+8y+1
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\left(4y+1\right)^{2}
Multiply 4y+1 and 4y+1 to get \left(4y+1\right)^{2}.
16y^{2}+8y+1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(4y+1\right)^{2}.
\left(4y+1\right)^{2}
Multiply 4y+1 and 4y+1 to get \left(4y+1\right)^{2}.
16y^{2}+8y+1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(4y+1\right)^{2}.
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