Evaluate
18\sqrt{2}\approx 25.455844123
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3\times 6\sqrt{2}
Factor 72=6^{2}\times 2. Rewrite the square root of the product \sqrt{6^{2}\times 2} as the product of square roots \sqrt{6^{2}}\sqrt{2}. Take the square root of 6^{2}.
18\sqrt{2}
Multiply 3 and 6 to get 18.
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