Evaluate
-220\sqrt{6}\approx -538.887743412
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-20\times 11\sqrt{6}
Factor 726=11^{2}\times 6. Rewrite the square root of the product \sqrt{11^{2}\times 6} as the product of square roots \sqrt{11^{2}}\sqrt{6}. Take the square root of 11^{2}.
-220\sqrt{6}
Multiply -20 and 11 to get -220.
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