Evaluate
-5\sqrt{6}\approx -12.247448714
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-2\times 2\sqrt{6}-\sqrt{6}
Factor 24=2^{2}\times 6. Rewrite the square root of the product \sqrt{2^{2}\times 6} as the product of square roots \sqrt{2^{2}}\sqrt{6}. Take the square root of 2^{2}.
-4\sqrt{6}-\sqrt{6}
Multiply -2 and 2 to get -4.
-5\sqrt{6}
Combine -4\sqrt{6} and -\sqrt{6} to get -5\sqrt{6}.
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