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