Evaluate
\frac{3}{2x+1}
Expand
\frac{3}{2x+1}
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Quiz
Polynomial
5 problems similar to:
\frac { x - 4 } { 2 x ^ { 2 } - x - 1 } + \frac { 1 } { x - 1 }
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\frac{x-4}{\left(x-1\right)\left(2x+1\right)}+\frac{1}{x-1}
Factor 2x^{2}-x-1.
\frac{x-4}{\left(x-1\right)\left(2x+1\right)}+\frac{2x+1}{\left(x-1\right)\left(2x+1\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of \left(x-1\right)\left(2x+1\right) and x-1 is \left(x-1\right)\left(2x+1\right). Multiply \frac{1}{x-1} times \frac{2x+1}{2x+1}.
\frac{x-4+2x+1}{\left(x-1\right)\left(2x+1\right)}
Since \frac{x-4}{\left(x-1\right)\left(2x+1\right)} and \frac{2x+1}{\left(x-1\right)\left(2x+1\right)} have the same denominator, add them by adding their numerators.
\frac{3x-3}{\left(x-1\right)\left(2x+1\right)}
Combine like terms in x-4+2x+1.
\frac{3\left(x-1\right)}{\left(x-1\right)\left(2x+1\right)}
Factor the expressions that are not already factored in \frac{3x-3}{\left(x-1\right)\left(2x+1\right)}.
\frac{3}{2x+1}
Cancel out x-1 in both numerator and denominator.
\frac{x-4}{\left(x-1\right)\left(2x+1\right)}+\frac{1}{x-1}
Factor 2x^{2}-x-1.
\frac{x-4}{\left(x-1\right)\left(2x+1\right)}+\frac{2x+1}{\left(x-1\right)\left(2x+1\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of \left(x-1\right)\left(2x+1\right) and x-1 is \left(x-1\right)\left(2x+1\right). Multiply \frac{1}{x-1} times \frac{2x+1}{2x+1}.
\frac{x-4+2x+1}{\left(x-1\right)\left(2x+1\right)}
Since \frac{x-4}{\left(x-1\right)\left(2x+1\right)} and \frac{2x+1}{\left(x-1\right)\left(2x+1\right)} have the same denominator, add them by adding their numerators.
\frac{3x-3}{\left(x-1\right)\left(2x+1\right)}
Combine like terms in x-4+2x+1.
\frac{3\left(x-1\right)}{\left(x-1\right)\left(2x+1\right)}
Factor the expressions that are not already factored in \frac{3x-3}{\left(x-1\right)\left(2x+1\right)}.
\frac{3}{2x+1}
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}