Evaluate
2\sqrt{21221}\approx 291.348588464
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2\sqrt{21221}
Factor 84884=2^{2}\times 21221. Rewrite the square root of the product \sqrt{2^{2}\times 21221} as the product of square roots \sqrt{2^{2}}\sqrt{21221}. Take the square root of 2^{2}.
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