Evaluate
9\sqrt{6}\approx 22.045407685
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3\sqrt{54}
Add 49 and 5 to get 54.
3\times 3\sqrt{6}
Factor 54=3^{2}\times 6. Rewrite the square root of the product \sqrt{3^{2}\times 6} as the product of square roots \sqrt{3^{2}}\sqrt{6}. Take the square root of 3^{2}.
9\sqrt{6}
Multiply 3 and 3 to get 9.
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