Evaluate
18\sqrt{39}\approx 112.409963971
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9\times 2\sqrt{39}
Factor 156=2^{2}\times 39. Rewrite the square root of the product \sqrt{2^{2}\times 39} as the product of square roots \sqrt{2^{2}}\sqrt{39}. Take the square root of 2^{2}.
18\sqrt{39}
Multiply 9 and 2 to get 18.
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