Evaluate
\left(x-11\right)\left(x+1\right)
Expand
x^{2}-10x-11
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x^{2}-10x+25-36
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-5\right)^{2}.
x^{2}-10x-11
Subtract 36 from 25 to get -11.
x^{2}-10x+25-36
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-5\right)^{2}.
x^{2}-10x-11
Subtract 36 from 25 to get -11.
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