Evaluate
4\sqrt{2}\approx 5.656854249
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\sqrt{4}\sqrt{2}\sqrt{4}
Factor 8=4\times 2. Rewrite the square root of the product \sqrt{4\times 2} as the product of square roots \sqrt{4}\sqrt{2}.
4\sqrt{2}
Multiply \sqrt{4} and \sqrt{4} to get 4.
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