Evaluate
7\sqrt{5}\approx 15.652475842
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11\sqrt{5}-\sqrt{80}
Factor 605=11^{2}\times 5. Rewrite the square root of the product \sqrt{11^{2}\times 5} as the product of square roots \sqrt{11^{2}}\sqrt{5}. Take the square root of 11^{2}.
11\sqrt{5}-4\sqrt{5}
Factor 80=4^{2}\times 5. Rewrite the square root of the product \sqrt{4^{2}\times 5} as the product of square roots \sqrt{4^{2}}\sqrt{5}. Take the square root of 4^{2}.
7\sqrt{5}
Combine 11\sqrt{5} and -4\sqrt{5} to get 7\sqrt{5}.
Examples
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y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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