Evaluate
\frac{9\left(3x-4\right)}{9x^{2}+7}
Expand
\frac{9\left(3x-4\right)}{9x^{2}+7}
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\frac{\frac{3x}{x}-\frac{4}{x}}{x+\frac{7}{9x}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 3 times \frac{x}{x}.
\frac{\frac{3x-4}{x}}{x+\frac{7}{9x}}
Since \frac{3x}{x} and \frac{4}{x} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{3x-4}{x}}{\frac{x\times 9x}{9x}+\frac{7}{9x}}
To add or subtract expressions, expand them to make their denominators the same. Multiply x times \frac{9x}{9x}.
\frac{\frac{3x-4}{x}}{\frac{x\times 9x+7}{9x}}
Since \frac{x\times 9x}{9x} and \frac{7}{9x} have the same denominator, add them by adding their numerators.
\frac{\frac{3x-4}{x}}{\frac{9x^{2}+7}{9x}}
Do the multiplications in x\times 9x+7.
\frac{\left(3x-4\right)\times 9x}{x\left(9x^{2}+7\right)}
Divide \frac{3x-4}{x} by \frac{9x^{2}+7}{9x} by multiplying \frac{3x-4}{x} by the reciprocal of \frac{9x^{2}+7}{9x}.
\frac{9\left(3x-4\right)}{9x^{2}+7}
Cancel out x in both numerator and denominator.
\frac{27x-36}{9x^{2}+7}
Use the distributive property to multiply 9 by 3x-4.
\frac{\frac{3x}{x}-\frac{4}{x}}{x+\frac{7}{9x}}
To add or subtract expressions, expand them to make their denominators the same. Multiply 3 times \frac{x}{x}.
\frac{\frac{3x-4}{x}}{x+\frac{7}{9x}}
Since \frac{3x}{x} and \frac{4}{x} have the same denominator, subtract them by subtracting their numerators.
\frac{\frac{3x-4}{x}}{\frac{x\times 9x}{9x}+\frac{7}{9x}}
To add or subtract expressions, expand them to make their denominators the same. Multiply x times \frac{9x}{9x}.
\frac{\frac{3x-4}{x}}{\frac{x\times 9x+7}{9x}}
Since \frac{x\times 9x}{9x} and \frac{7}{9x} have the same denominator, add them by adding their numerators.
\frac{\frac{3x-4}{x}}{\frac{9x^{2}+7}{9x}}
Do the multiplications in x\times 9x+7.
\frac{\left(3x-4\right)\times 9x}{x\left(9x^{2}+7\right)}
Divide \frac{3x-4}{x} by \frac{9x^{2}+7}{9x} by multiplying \frac{3x-4}{x} by the reciprocal of \frac{9x^{2}+7}{9x}.
\frac{9\left(3x-4\right)}{9x^{2}+7}
Cancel out x in both numerator and denominator.
\frac{27x-36}{9x^{2}+7}
Use the distributive property to multiply 9 by 3x-4.
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}