Expand
x^{2}-40x+410
Evaluate
\left(x-20\right)^{2}+10
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x^{2}-40x+400+10
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-20\right)^{2}.
x^{2}-40x+410
Add 400 and 10 to get 410.
x^{2}-40x+400+10
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-20\right)^{2}.
x^{2}-40x+410
Add 400 and 10 to get 410.
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