Evaluate
-38\sqrt{5}\approx -84.970583145
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-2\times 19\sqrt{5}
Factor 1805=19^{2}\times 5. Rewrite the square root of the product \sqrt{19^{2}\times 5} as the product of square roots \sqrt{19^{2}}\sqrt{5}. Take the square root of 19^{2}.
-38\sqrt{5}
Multiply -2 and 19 to get -38.
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