Evaluate
\left(x+4\right)^{2}+7
Expand
x^{2}+8x+23
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x^{2}+8x+16+7
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+4\right)^{2}.
x^{2}+8x+23
Add 16 and 7 to get 23.
x^{2}+8x+16+7
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+4\right)^{2}.
x^{2}+8x+23
Add 16 and 7 to get 23.
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