Evaluate
\sqrt{31}\approx 5.567764363
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\frac{2\sqrt{31}}{2}
Factor 124=2^{2}\times 31. Rewrite the square root of the product \sqrt{2^{2}\times 31} as the product of square roots \sqrt{2^{2}}\sqrt{31}. Take the square root of 2^{2}.
\sqrt{31}
Cancel out 2 and 2.
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