Expand
x^{2}-2\sqrt{5}x+5
Evaluate
\left(x-\sqrt{5}\right)^{2}
Graph
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x^{2}-2x\sqrt{5}+\left(\sqrt{5}\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-\sqrt{5}\right)^{2}.
x^{2}-2x\sqrt{5}+5
The square of \sqrt{5} is 5.
x^{2}-2x\sqrt{5}+\left(\sqrt{5}\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-\sqrt{5}\right)^{2}.
x^{2}-2x\sqrt{5}+5
The square of \sqrt{5} is 5.
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