Factor
\left(x-4\right)\left(a+2b\right)
Evaluate
\left(x-4\right)\left(a+2b\right)
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a\left(x-4\right)+2b\left(x-4\right)
Do the grouping ax-4a+2bx-8b=\left(ax-4a\right)+\left(2bx-8b\right), and factor out a in the first and 2b in the second group.
\left(x-4\right)\left(a+2b\right)
Factor out common term x-4 by using distributive property.
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