Evaluate
\frac{6x+7b}{x-b}
Differentiate w.r.t. x
-\frac{13b}{\left(x-b\right)^{2}}
Graph
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\frac{-6x}{-x+b}-\frac{7b}{-x+b}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x-b and b-x is -x+b. Multiply \frac{6x}{x-b} times \frac{-1}{-1}.
\frac{-6x-7b}{-x+b}
Since \frac{-6x}{-x+b} and \frac{7b}{-x+b} have the same denominator, subtract them by subtracting their numerators.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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