Evaluate
6\sqrt{11}+11\approx 30.899748742
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11+2\times 3\sqrt{11}
Factor 99=3^{2}\times 11. Rewrite the square root of the product \sqrt{3^{2}\times 11} as the product of square roots \sqrt{3^{2}}\sqrt{11}. Take the square root of 3^{2}.
11+6\sqrt{11}
Multiply 2 and 3 to get 6.
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