Evaluate
\frac{9}{4}=2.25
Factor
\frac{3 ^ {2}}{2 ^ {2}} = 2\frac{1}{4} = 2.25
Graph
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\frac{2^{-2}x^{-2}}{\left(3x\right)^{-2}}
Expand \left(2x\right)^{-2}.
\frac{\frac{1}{4}x^{-2}}{\left(3x\right)^{-2}}
Calculate 2 to the power of -2 and get \frac{1}{4}.
\frac{\frac{1}{4}x^{-2}}{3^{-2}x^{-2}}
Expand \left(3x\right)^{-2}.
\frac{\frac{1}{4}x^{-2}}{\frac{1}{9}x^{-2}}
Calculate 3 to the power of -2 and get \frac{1}{9}.
\frac{\frac{1}{4}}{\frac{1}{9}}
Cancel out x^{-2} in both numerator and denominator.
\frac{1}{4}\times 9
Divide \frac{1}{4} by \frac{1}{9} by multiplying \frac{1}{4} by the reciprocal of \frac{1}{9}.
\frac{9}{4}
Multiply \frac{1}{4} and 9 to get \frac{9}{4}.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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}