Evaluate
4\sqrt{5}\approx 8.94427191
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12\sqrt{5}-\sqrt{320}
Factor 720=12^{2}\times 5. Rewrite the square root of the product \sqrt{12^{2}\times 5} as the product of square roots \sqrt{12^{2}}\sqrt{5}. Take the square root of 12^{2}.
12\sqrt{5}-8\sqrt{5}
Factor 320=8^{2}\times 5. Rewrite the square root of the product \sqrt{8^{2}\times 5} as the product of square roots \sqrt{8^{2}}\sqrt{5}. Take the square root of 8^{2}.
4\sqrt{5}
Combine 12\sqrt{5} and -8\sqrt{5} to get 4\sqrt{5}.
Examples
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Limits
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