Evaluate
\left(x+9\right)^{2}+7
Expand
x^{2}+18x+88
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x^{2}+18x+81+7
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+9\right)^{2}.
x^{2}+18x+88
Add 81 and 7 to get 88.
x^{2}+18x+81+7
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+9\right)^{2}.
x^{2}+18x+88
Add 81 and 7 to get 88.
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