Evaluate
20
Factor
2^{2}\times 5
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2\sqrt{5}\left(5\sqrt{5}-3\sqrt{5}\right)
Factor 125=5^{2}\times 5. Rewrite the square root of the product \sqrt{5^{2}\times 5} as the product of square roots \sqrt{5^{2}}\sqrt{5}. Take the square root of 5^{2}.
2\sqrt{5}\times 2\sqrt{5}
Combine 5\sqrt{5} and -3\sqrt{5} to get 2\sqrt{5}.
4\sqrt{5}\sqrt{5}
Multiply 2 and 2 to get 4.
4\times 5
Multiply \sqrt{5} and \sqrt{5} to get 5.
20
Multiply 4 and 5 to get 20.
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Limits
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