Evaluate
\frac{3r^{2}}{r-7}
Expand
\frac{3r^{2}}{r-7}
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\frac{3\left(r+2\right)r^{2}}{r+2}\times \frac{1}{r-7}
Factor the expressions that are not already factored in \frac{3r^{3}+6r^{2}}{r+2}.
3r^{2}\times \frac{1}{r-7}
Cancel out r+2 in both numerator and denominator.
\frac{3}{r-7}r^{2}
Express 3\times \frac{1}{r-7} as a single fraction.
\frac{3r^{2}}{r-7}
Express \frac{3}{r-7}r^{2} as a single fraction.
\frac{3\left(r+2\right)r^{2}}{r+2}\times \frac{1}{r-7}
Factor the expressions that are not already factored in \frac{3r^{3}+6r^{2}}{r+2}.
3r^{2}\times \frac{1}{r-7}
Cancel out r+2 in both numerator and denominator.
\frac{3}{r-7}r^{2}
Express 3\times \frac{1}{r-7} as a single fraction.
\frac{3r^{2}}{r-7}
Express \frac{3}{r-7}r^{2} as a single fraction.
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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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