Expand
x^{2}+16x-1
Evaluate
\left(x+8\right)^{2}-65
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x^{2}+16x+64-65
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+8\right)^{2}.
x^{2}+16x-1
Subtract 65 from 64 to get -1.
x^{2}+16x+64-65
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+8\right)^{2}.
x^{2}+16x-1
Subtract 65 from 64 to get -1.
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