Evaluate
5\sqrt{21}\approx 22.912878475
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\sqrt{525}
Multiply 21 and 25 to get 525.
5\sqrt{21}
Factor 525=5^{2}\times 21. Rewrite the square root of the product \sqrt{5^{2}\times 21} as the product of square roots \sqrt{5^{2}}\sqrt{21}. Take the square root of 5^{2}.
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