Expand
64x^{2}+16\sqrt{5}x+5
Evaluate
\left(8x+\sqrt{5}\right)^{2}
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64x^{2}+16x\sqrt{5}+\left(\sqrt{5}\right)^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(8x+\sqrt{5}\right)^{2}.
64x^{2}+16x\sqrt{5}+5
The square of \sqrt{5} is 5.
64x^{2}+16x\sqrt{5}+\left(\sqrt{5}\right)^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(8x+\sqrt{5}\right)^{2}.
64x^{2}+16x\sqrt{5}+5
The square of \sqrt{5} is 5.
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