Factor by Grouping ab+9a-2b-18

Math
ab+9a-2b-18
Factor out the greatest common factor from each group.
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Group the first two terms and the last two terms.
(ab+9a)-2b-18
Factor out the greatest common factor (GCF) from each group.
a(b+9)-2(b+9)
a(b+9)-2(b+9)
Factor the polynomial by factoring out the greatest common factor, b+9.
(b+9)(a-2)
Factor by Grouping ab+9a-2b-18

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