Evaluate
2\sqrt{11}-\sqrt{34}\approx 0.802297686
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2\sqrt{11}-\sqrt{34}
Factor 44=2^{2}\times 11. Rewrite the square root of the product \sqrt{2^{2}\times 11} as the product of square roots \sqrt{2^{2}}\sqrt{11}. Take the square root of 2^{2}.
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