Evaluate
18
Factor
2\times 3^{2}
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\frac{720\times 3!}{2!\times 5!}
The factorial of 6 is 720.
\frac{720\times 6}{2!\times 5!}
The factorial of 3 is 6.
\frac{4320}{2!\times 5!}
Multiply 720 and 6 to get 4320.
\frac{4320}{2\times 5!}
The factorial of 2 is 2.
\frac{4320}{2\times 120}
The factorial of 5 is 120.
\frac{4320}{240}
Multiply 2 and 120 to get 240.
18
Divide 4320 by 240 to get 18.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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