Evaluate
\frac{9}{x+3}
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\frac{9}{x+3}
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3\times \frac{3\left(x-3\right)}{\left(x-3\right)\left(x+3\right)}
Factor the expressions that are not already factored in \frac{3x-9}{x^{2}-9}.
3\times \frac{3}{x+3}
Cancel out x-3 in both numerator and denominator.
\frac{3\times 3}{x+3}
Express 3\times \frac{3}{x+3} as a single fraction.
\frac{9}{x+3}
Multiply 3 and 3 to get 9.
3\times \frac{3\left(x-3\right)}{\left(x-3\right)\left(x+3\right)}
Factor the expressions that are not already factored in \frac{3x-9}{x^{2}-9}.
3\times \frac{3}{x+3}
Cancel out x-3 in both numerator and denominator.
\frac{3\times 3}{x+3}
Express 3\times \frac{3}{x+3} as a single fraction.
\frac{9}{x+3}
Multiply 3 and 3 to get 9.
Examples
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y = 3x + 4
Arithmetic
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Matrix
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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}