Evaluate
15\sqrt{11}\approx 49.749371855
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4\times 3\sqrt{11}+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}.
12\sqrt{11}+3\sqrt{11}
Multiply 4 and 3 to get 12.
15\sqrt{11}
Combine 12\sqrt{11} and 3\sqrt{11} to get 15\sqrt{11}.
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