Factor
\left(c+3\right)\left(m-n\right)
Evaluate
\left(c+3\right)\left(m-n\right)
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c\left(m-n\right)+3\left(m-n\right)
Do the grouping cm-cn+3m-3n=\left(cm-cn\right)+\left(3m-3n\right), and factor out c in the first and 3 in the second group.
\left(m-n\right)\left(c+3\right)
Factor out common term m-n by using distributive property.
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