Evaluate
\sqrt{2}+2\sqrt{159}\approx 26.633253988
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\sqrt{2}+2\sqrt{159}
Factor 636=2^{2}\times 159. Rewrite the square root of the product \sqrt{2^{2}\times 159} as the product of square roots \sqrt{2^{2}}\sqrt{159}. Take the square root of 2^{2}.
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