Evaluate
2\sqrt{5}\approx 4.472135955
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\sqrt{5}+2+\sqrt{5}-1\times 2
Multiply 1 and 2 to get 2.
2\sqrt{5}+2-1\times 2
Combine \sqrt{5} and \sqrt{5} to get 2\sqrt{5}.
2\sqrt{5}+2-2
Multiply 1 and 2 to get 2.
2\sqrt{5}
Subtract 2 from 2 to get 0.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
Arithmetic
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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