Evaluate
\frac{13\sqrt{3}}{2}\approx 11.258330249
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\frac{\sqrt{13}\sqrt{13}\sqrt{3}}{2}
Factor 39=13\times 3. Rewrite the square root of the product \sqrt{13\times 3} as the product of square roots \sqrt{13}\sqrt{3}.
\frac{13\sqrt{3}}{2}
Multiply \sqrt{13} and \sqrt{13} to get 13.
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