Factor
\left(a+1\right)\left(12b+1\right)
Evaluate
\left(a+1\right)\left(12b+1\right)
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a\left(12b+1\right)+12b+1
Do the grouping 12ab+a+12b+1=\left(12ab+a\right)+\left(12b+1\right), and factor out a in 12ab+a.
\left(12b+1\right)\left(a+1\right)
Factor out common term 12b+1 by using distributive property.
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