Evaluate
-\sqrt{10}\approx -3.16227766
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\sqrt{10}-2\sqrt{10}-0\sqrt{9}
Factor 40=2^{2}\times 10. Rewrite the square root of the product \sqrt{2^{2}\times 10} as the product of square roots \sqrt{2^{2}}\sqrt{10}. Take the square root of 2^{2}.
-\sqrt{10}-0\sqrt{9}
Combine \sqrt{10} and -2\sqrt{10} to get -\sqrt{10}.
-\sqrt{10}-0\times 3
Calculate the square root of 9 and get 3.
-\sqrt{10}-0
Multiply 0 and 3 to get 0.
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