Evaluate
256\sqrt{745}\approx 6987.440160746
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128\times 2\sqrt{745}
Factor 2980=2^{2}\times 745. Rewrite the square root of the product \sqrt{2^{2}\times 745} as the product of square roots \sqrt{2^{2}}\sqrt{745}. Take the square root of 2^{2}.
256\sqrt{745}
Multiply 128 and 2 to get 256.
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