Evaluate
-\frac{1}{2\left(x+1\right)}
Expand
-\frac{1}{2\left(x+1\right)}
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\left(\frac{x\left(x+1\right)}{\left(x-1\right)\left(x+1\right)}-\frac{x\left(x-1\right)}{\left(x-1\right)\left(x+1\right)}\right)\times \frac{1-x}{4x}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x-1 and x+1 is \left(x-1\right)\left(x+1\right). Multiply \frac{x}{x-1} times \frac{x+1}{x+1}. Multiply \frac{x}{x+1} times \frac{x-1}{x-1}.
\frac{x\left(x+1\right)-x\left(x-1\right)}{\left(x-1\right)\left(x+1\right)}\times \frac{1-x}{4x}
Since \frac{x\left(x+1\right)}{\left(x-1\right)\left(x+1\right)} and \frac{x\left(x-1\right)}{\left(x-1\right)\left(x+1\right)} have the same denominator, subtract them by subtracting their numerators.
\frac{x^{2}+x-x^{2}+x}{\left(x-1\right)\left(x+1\right)}\times \frac{1-x}{4x}
Do the multiplications in x\left(x+1\right)-x\left(x-1\right).
\frac{2x}{\left(x-1\right)\left(x+1\right)}\times \frac{1-x}{4x}
Combine like terms in x^{2}+x-x^{2}+x.
\frac{2x\left(1-x\right)}{\left(x-1\right)\left(x+1\right)\times 4x}
Multiply \frac{2x}{\left(x-1\right)\left(x+1\right)} times \frac{1-x}{4x} by multiplying numerator times numerator and denominator times denominator.
\frac{-2x\left(x-1\right)}{4x\left(x-1\right)\left(x+1\right)}
Extract the negative sign in 1-x.
\frac{-1}{2\left(x+1\right)}
Cancel out 2x\left(x-1\right) in both numerator and denominator.
\frac{-1}{2x+2}
Use the distributive property to multiply 2 by x+1.
\left(\frac{x\left(x+1\right)}{\left(x-1\right)\left(x+1\right)}-\frac{x\left(x-1\right)}{\left(x-1\right)\left(x+1\right)}\right)\times \frac{1-x}{4x}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x-1 and x+1 is \left(x-1\right)\left(x+1\right). Multiply \frac{x}{x-1} times \frac{x+1}{x+1}. Multiply \frac{x}{x+1} times \frac{x-1}{x-1}.
\frac{x\left(x+1\right)-x\left(x-1\right)}{\left(x-1\right)\left(x+1\right)}\times \frac{1-x}{4x}
Since \frac{x\left(x+1\right)}{\left(x-1\right)\left(x+1\right)} and \frac{x\left(x-1\right)}{\left(x-1\right)\left(x+1\right)} have the same denominator, subtract them by subtracting their numerators.
\frac{x^{2}+x-x^{2}+x}{\left(x-1\right)\left(x+1\right)}\times \frac{1-x}{4x}
Do the multiplications in x\left(x+1\right)-x\left(x-1\right).
\frac{2x}{\left(x-1\right)\left(x+1\right)}\times \frac{1-x}{4x}
Combine like terms in x^{2}+x-x^{2}+x.
\frac{2x\left(1-x\right)}{\left(x-1\right)\left(x+1\right)\times 4x}
Multiply \frac{2x}{\left(x-1\right)\left(x+1\right)} times \frac{1-x}{4x} by multiplying numerator times numerator and denominator times denominator.
\frac{-2x\left(x-1\right)}{4x\left(x-1\right)\left(x+1\right)}
Extract the negative sign in 1-x.
\frac{-1}{2\left(x+1\right)}
Cancel out 2x\left(x-1\right) in both numerator and denominator.
\frac{-1}{2x+2}
Use the distributive property to multiply 2 by x+1.
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}