Factor by Grouping 7x-9+21ax-27a

Math
7x-9+21ax-27a
Factor out the greatest common factor from each group.
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Group the first two terms and the last two terms.
(7x-9)+21ax-27a
Factor out the greatest common factor (GCF) from each group.
1(7x-9)+3a(7x-9)
1(7x-9)+3a(7x-9)
Factor the polynomial by factoring out the greatest common factor, 7x-9.
(7x-9)(1+3a)
Factor by Grouping 7x-9+21ax-27a

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