Evaluate
\left(x+2\right)^{2}-3
Expand
x^{2}+4x+1
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x^{2}+4x+4-3
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{2}+4x+1
Subtract 3 from 4 to get 1.
x^{2}+4x+4-3
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{2}+4x+1
Subtract 3 from 4 to get 1.
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