Factor
\left(n-4\right)\left(m+3\right)
Evaluate
\left(n-4\right)\left(m+3\right)
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m\left(n-4\right)+3\left(n-4\right)
Do the grouping mn-4m+3n-12=\left(mn-4m\right)+\left(3n-12\right), and factor out m in the first and 3 in the second group.
\left(n-4\right)\left(m+3\right)
Factor out common term n-4 by using distributive property.
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