Evaluate
8\left(\sqrt{41}-16\right)\approx -76.775006101
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4\sqrt{164}-128
Calculate the square root of 16 and get 4.
4\times 2\sqrt{41}-128
Factor 164=2^{2}\times 41. Rewrite the square root of the product \sqrt{2^{2}\times 41} as the product of square roots \sqrt{2^{2}}\sqrt{41}. Take the square root of 2^{2}.
8\sqrt{41}-128
Multiply 4 and 2 to get 8.
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