Factor
\left(c+3\right)\left(a+b\right)
Evaluate
\left(c+3\right)\left(a+b\right)
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c\left(a+b\right)+3\left(a+b\right)
Do the grouping ac+bc+3a+3b=\left(ac+bc\right)+\left(3a+3b\right), and factor out c in the first and 3 in the second group.
\left(a+b\right)\left(c+3\right)
Factor out common term a+b by using distributive property.
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