Evaluate
\sqrt{2}+3\sqrt{6}\approx 8.762682791
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\sqrt{2}+\sqrt{3}\sqrt{3}\sqrt{6}
Factor 18=3\times 6. Rewrite the square root of the product \sqrt{3\times 6} as the product of square roots \sqrt{3}\sqrt{6}.
\sqrt{2}+3\sqrt{6}
Multiply \sqrt{3} and \sqrt{3} to get 3.
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