Expand
x^{2}-18x+85
Evaluate
\left(x-9\right)^{2}+4
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x^{2}-18x+81+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-9\right)^{2}.
x^{2}-18x+85
Add 81 and 4 to get 85.
x^{2}-18x+81+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-9\right)^{2}.
x^{2}-18x+85
Add 81 and 4 to get 85.
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