Evaluate
\frac{x-1}{x+1}
Expand
\frac{x-1}{x+1}
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\frac{\frac{9\left(x+1\right)}{x+1}-\frac{9}{x+1}}{9+\frac{9}{x-1}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 9 times \frac{x+1}{x+1}.
\frac{\frac{9\left(x+1\right)-9}{x+1}}{9+\frac{9}{x-1}}
Since \frac{9\left(x+1\right)}{x+1} and \frac{9}{x+1} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{9x+9-9}{x+1}}{9+\frac{9}{x-1}}
Do the multiplications in 9\left(x+1\right)-9.
\frac{\frac{9x}{x+1}}{9+\frac{9}{x-1}}
Combine like terms in 9x+9-9.
\frac{\frac{9x}{x+1}}{\frac{9\left(x-1\right)}{x-1}+\frac{9}{x-1}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 9 times \frac{x-1}{x-1}.
\frac{\frac{9x}{x+1}}{\frac{9\left(x-1\right)+9}{x-1}}
Since \frac{9\left(x-1\right)}{x-1} and \frac{9}{x-1} have the same denominator, add them by adding their numerators.
\frac{\frac{9x}{x+1}}{\frac{9x-9+9}{x-1}}
Do the multiplications in 9\left(x-1\right)+9.
\frac{\frac{9x}{x+1}}{\frac{9x}{x-1}}
Combine like terms in 9x-9+9.
\frac{9x\left(x-1\right)}{\left(x+1\right)\times 9x}
Divide \frac{9x}{x+1} by \frac{9x}{x-1} by multiplying \frac{9x}{x+1} by the reciprocal of \frac{9x}{x-1}.
\frac{x-1}{x+1}
Cancel out 9x in both numerator and denominator.
\frac{\frac{9\left(x+1\right)}{x+1}-\frac{9}{x+1}}{9+\frac{9}{x-1}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 9 times \frac{x+1}{x+1}.
\frac{\frac{9\left(x+1\right)-9}{x+1}}{9+\frac{9}{x-1}}
Since \frac{9\left(x+1\right)}{x+1} and \frac{9}{x+1} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{9x+9-9}{x+1}}{9+\frac{9}{x-1}}
Do the multiplications in 9\left(x+1\right)-9.
\frac{\frac{9x}{x+1}}{9+\frac{9}{x-1}}
Combine like terms in 9x+9-9.
\frac{\frac{9x}{x+1}}{\frac{9\left(x-1\right)}{x-1}+\frac{9}{x-1}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 9 times \frac{x-1}{x-1}.
\frac{\frac{9x}{x+1}}{\frac{9\left(x-1\right)+9}{x-1}}
Since \frac{9\left(x-1\right)}{x-1} and \frac{9}{x-1} have the same denominator, add them by adding their numerators.
\frac{\frac{9x}{x+1}}{\frac{9x-9+9}{x-1}}
Do the multiplications in 9\left(x-1\right)+9.
\frac{\frac{9x}{x+1}}{\frac{9x}{x-1}}
Combine like terms in 9x-9+9.
\frac{9x\left(x-1\right)}{\left(x+1\right)\times 9x}
Divide \frac{9x}{x+1} by \frac{9x}{x-1} by multiplying \frac{9x}{x+1} by the reciprocal of \frac{9x}{x-1}.
\frac{x-1}{x+1}
Cancel out 9x in both numerator and denominator.
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}