Factor
\left(a+1\right)\left(a-2b\right)
Evaluate
\left(a+1\right)\left(a-2b\right)
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a\left(a+1\right)-2b\left(a+1\right)
Do the grouping a^{2}+a-2ab-2b=\left(a^{2}+a\right)+\left(-2ab-2b\right), and factor out a in the first and -2b in the second group.
\left(a+1\right)\left(a-2b\right)
Factor out common term a+1 by using distributive property.
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