Evaluate
6\sqrt{7}\approx 15.874507866
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\sqrt{252}
Multiply 12 and 21 to get 252.
6\sqrt{7}
Factor 252=6^{2}\times 7. Rewrite the square root of the product \sqrt{6^{2}\times 7} as the product of square roots \sqrt{6^{2}}\sqrt{7}. Take the square root of 6^{2}.
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