Evaluate
18
Factor
2\times 3^{2}
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\frac{-\frac{36}{5}}{\frac{2\left(-1\right)}{5}}
Express 2\left(-\frac{1}{5}\right) as a single fraction.
\frac{-\frac{36}{5}}{\frac{-2}{5}}
Multiply 2 and -1 to get -2.
\frac{-\frac{36}{5}}{-\frac{2}{5}}
Fraction \frac{-2}{5} can be rewritten as -\frac{2}{5} by extracting the negative sign.
-\frac{36}{5}\left(-\frac{5}{2}\right)
Divide -\frac{36}{5} by -\frac{2}{5} by multiplying -\frac{36}{5} by the reciprocal of -\frac{2}{5}.
\frac{-36\left(-5\right)}{5\times 2}
Multiply -\frac{36}{5} times -\frac{5}{2} by multiplying numerator times numerator and denominator times denominator.
\frac{180}{10}
Do the multiplications in the fraction \frac{-36\left(-5\right)}{5\times 2}.
18
Divide 180 by 10 to get 18.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}