Evaluate
-37\sqrt{10}\approx -117.004273426
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3\sqrt{10}-8\times 5\sqrt{10}
Factor 250=5^{2}\times 10. Rewrite the square root of the product \sqrt{5^{2}\times 10} as the product of square roots \sqrt{5^{2}}\sqrt{10}. Take the square root of 5^{2}.
3\sqrt{10}-40\sqrt{10}
Multiply -8 and 5 to get -40.
-37\sqrt{10}
Combine 3\sqrt{10} and -40\sqrt{10} to get -37\sqrt{10}.
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