Evaluate
\frac{2x^{2}+2x-1}{\left(x-1\right)\left(x+2\right)}
Expand
\frac{2x^{2}+2x-1}{\left(x-1\right)\left(x+2\right)}
Graph
Quiz
Polynomial
5 problems similar to:
\frac { 2 x + 1 } { x + 2 } + \frac { 3 x } { x ^ { 2 } + x - 2 }
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\frac{2x+1}{x+2}+\frac{3x}{\left(x-1\right)\left(x+2\right)}
Factor x^{2}+x-2.
\frac{\left(2x+1\right)\left(x-1\right)}{\left(x-1\right)\left(x+2\right)}+\frac{3x}{\left(x-1\right)\left(x+2\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x+2 and \left(x-1\right)\left(x+2\right) is \left(x-1\right)\left(x+2\right). Multiply \frac{2x+1}{x+2} times \frac{x-1}{x-1}.
\frac{\left(2x+1\right)\left(x-1\right)+3x}{\left(x-1\right)\left(x+2\right)}
Since \frac{\left(2x+1\right)\left(x-1\right)}{\left(x-1\right)\left(x+2\right)} and \frac{3x}{\left(x-1\right)\left(x+2\right)} have the same denominator, add them by adding their numerators.
\frac{2x^{2}-2x+x-1+3x}{\left(x-1\right)\left(x+2\right)}
Do the multiplications in \left(2x+1\right)\left(x-1\right)+3x.
\frac{2x^{2}+2x-1}{\left(x-1\right)\left(x+2\right)}
Combine like terms in 2x^{2}-2x+x-1+3x.
\frac{2x^{2}+2x-1}{x^{2}+x-2}
Expand \left(x-1\right)\left(x+2\right).
\frac{2x+1}{x+2}+\frac{3x}{\left(x-1\right)\left(x+2\right)}
Factor x^{2}+x-2.
\frac{\left(2x+1\right)\left(x-1\right)}{\left(x-1\right)\left(x+2\right)}+\frac{3x}{\left(x-1\right)\left(x+2\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x+2 and \left(x-1\right)\left(x+2\right) is \left(x-1\right)\left(x+2\right). Multiply \frac{2x+1}{x+2} times \frac{x-1}{x-1}.
\frac{\left(2x+1\right)\left(x-1\right)+3x}{\left(x-1\right)\left(x+2\right)}
Since \frac{\left(2x+1\right)\left(x-1\right)}{\left(x-1\right)\left(x+2\right)} and \frac{3x}{\left(x-1\right)\left(x+2\right)} have the same denominator, add them by adding their numerators.
\frac{2x^{2}-2x+x-1+3x}{\left(x-1\right)\left(x+2\right)}
Do the multiplications in \left(2x+1\right)\left(x-1\right)+3x.
\frac{2x^{2}+2x-1}{\left(x-1\right)\left(x+2\right)}
Combine like terms in 2x^{2}-2x+x-1+3x.
\frac{2x^{2}+2x-1}{x^{2}+x-2}
Expand \left(x-1\right)\left(x+2\right).
Examples
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{ 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}