Evaluate
3-6\sqrt{5}\approx -10.416407865
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3-6\sqrt{5}
Factor 180=6^{2}\times 5. Rewrite the square root of the product \sqrt{6^{2}\times 5} as the product of square roots \sqrt{6^{2}}\sqrt{5}. Take the square root of 6^{2}.
Examples
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Matrix
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