Factor
\left(x-3\right)\left(y+7\right)
Evaluate
\left(x-3\right)\left(y+7\right)
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x\left(y+7\right)-3\left(y+7\right)
Do the grouping 7x-3y+xy-21=\left(xy+7x\right)+\left(-3y-21\right), and factor out x in the first and -3 in the second group.
\left(y+7\right)\left(x-3\right)
Factor out common term y+7 by using distributive property.
Examples
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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