Evaluate
\frac{2}{x-4}
Expand
\frac{2}{x-4}
Graph
Quiz
Polynomial
5 problems similar to:
\frac { 1 } { x - 1 } + \frac { x + 2 } { x ^ { 2 } - 5 x + 4 }
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\frac{1}{x-1}+\frac{x+2}{\left(x-4\right)\left(x-1\right)}
Factor x^{2}-5x+4.
\frac{x-4}{\left(x-4\right)\left(x-1\right)}+\frac{x+2}{\left(x-4\right)\left(x-1\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x-1 and \left(x-4\right)\left(x-1\right) is \left(x-4\right)\left(x-1\right). Multiply \frac{1}{x-1} times \frac{x-4}{x-4}.
\frac{x-4+x+2}{\left(x-4\right)\left(x-1\right)}
Since \frac{x-4}{\left(x-4\right)\left(x-1\right)} and \frac{x+2}{\left(x-4\right)\left(x-1\right)} have the same denominator, add them by adding their numerators.
\frac{2x-2}{\left(x-4\right)\left(x-1\right)}
Combine like terms in x-4+x+2.
\frac{2\left(x-1\right)}{\left(x-4\right)\left(x-1\right)}
Factor the expressions that are not already factored in \frac{2x-2}{\left(x-4\right)\left(x-1\right)}.
\frac{2}{x-4}
Cancel out x-1 in both numerator and denominator.
\frac{1}{x-1}+\frac{x+2}{\left(x-4\right)\left(x-1\right)}
Factor x^{2}-5x+4.
\frac{x-4}{\left(x-4\right)\left(x-1\right)}+\frac{x+2}{\left(x-4\right)\left(x-1\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x-1 and \left(x-4\right)\left(x-1\right) is \left(x-4\right)\left(x-1\right). Multiply \frac{1}{x-1} times \frac{x-4}{x-4}.
\frac{x-4+x+2}{\left(x-4\right)\left(x-1\right)}
Since \frac{x-4}{\left(x-4\right)\left(x-1\right)} and \frac{x+2}{\left(x-4\right)\left(x-1\right)} have the same denominator, add them by adding their numerators.
\frac{2x-2}{\left(x-4\right)\left(x-1\right)}
Combine like terms in x-4+x+2.
\frac{2\left(x-1\right)}{\left(x-4\right)\left(x-1\right)}
Factor the expressions that are not already factored in \frac{2x-2}{\left(x-4\right)\left(x-1\right)}.
\frac{2}{x-4}
Cancel out x-1 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}