Evaluate
9\sqrt{11}+20\sqrt{10}\approx 93.095176317
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3\times 3\sqrt{11}+4\sqrt{250}
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}.
9\sqrt{11}+4\sqrt{250}
Multiply 3 and 3 to get 9.
9\sqrt{11}+4\times 5\sqrt{10}
Factor 250=5^{2}\times 10. Rewrite the square root of the product \sqrt{5^{2}\times 10} as the product of square roots \sqrt{5^{2}}\sqrt{10}. Take the square root of 5^{2}.
9\sqrt{11}+20\sqrt{10}
Multiply 4 and 5 to get 20.
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