Evaluate
-30\sqrt{2}\approx -42.426406871
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2\sqrt{3}\left(-5\right)\sqrt{3}\sqrt{2}
Factor 6=3\times 2. Rewrite the square root of the product \sqrt{3\times 2} as the product of square roots \sqrt{3}\sqrt{2}.
2\times 3\left(-5\right)\sqrt{2}
Multiply \sqrt{3} and \sqrt{3} to get 3.
6\left(-5\right)\sqrt{2}
Multiply 2 and 3 to get 6.
-30\sqrt{2}
Multiply 6 and -5 to get -30.
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