Evaluate
\sqrt{5}+1\approx 3.236067977
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\frac{2+2\sqrt{5}}{2}
Factor 20=2^{2}\times 5. Rewrite the square root of the product \sqrt{2^{2}\times 5} as the product of square roots \sqrt{2^{2}}\sqrt{5}. Take the square root of 2^{2}.
1+\sqrt{5}
Divide each term of 2+2\sqrt{5} by 2 to get 1+\sqrt{5}.
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