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