Evaluate
12-2\sqrt{14}\approx 4.516685226
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2\times 6-\sqrt{56}
Calculate the square root of 36 and get 6.
12-\sqrt{56}
Multiply 2 and 6 to get 12.
12-2\sqrt{14}
Factor 56=2^{2}\times 14. Rewrite the square root of the product \sqrt{2^{2}\times 14} as the product of square roots \sqrt{2^{2}}\sqrt{14}. Take the square root of 2^{2}.
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