Evaluate
2\sqrt{195}\approx 27.928480088
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\sqrt{780}
Multiply 52 and 15 to get 780.
2\sqrt{195}
Factor 780=2^{2}\times 195. Rewrite the square root of the product \sqrt{2^{2}\times 195} as the product of square roots \sqrt{2^{2}}\sqrt{195}. Take the square root of 2^{2}.
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