Evaluate
9\sqrt{2}\approx 12.727922061
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\sqrt{9}\sqrt{2}\sqrt{9}
Factor 18=9\times 2. Rewrite the square root of the product \sqrt{9\times 2} as the product of square roots \sqrt{9}\sqrt{2}.
9\sqrt{2}
Multiply \sqrt{9} and \sqrt{9} to get 9.
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