Evaluate
2\sqrt{109}\approx 20.880613018
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1\times 2\sqrt{109}
Factor 436=2^{2}\times 109. Rewrite the square root of the product \sqrt{2^{2}\times 109} as the product of square roots \sqrt{2^{2}}\sqrt{109}. Take the square root of 2^{2}.
2\sqrt{109}
Multiply 1 and 2 to get 2.
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