Evaluate
4\sqrt{5}-5\sqrt{2}\approx 1.873204098
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4\sqrt{5}-\sqrt{5}\sqrt{10}
Use the distributive property to multiply \sqrt{5} by 4-\sqrt{10}.
4\sqrt{5}-\sqrt{5}\sqrt{5}\sqrt{2}
Factor 10=5\times 2. Rewrite the square root of the product \sqrt{5\times 2} as the product of square roots \sqrt{5}\sqrt{2}.
4\sqrt{5}-5\sqrt{2}
Multiply \sqrt{5} and \sqrt{5} to get 5.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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