Evaluate
\left(z+1\right)^{2}+x^{2}+y^{2}
Expand
x^{2}+y^{2}+z^{2}+2z+1
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x^{2}+y^{2}+z^{2}+2z+1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(z+1\right)^{2}.
x^{2}+y^{2}+z^{2}+2z+1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(z+1\right)^{2}.
Examples
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