Factor by Grouping 9z^2+36z-az-4a

Math
9z2+36z-az-4a
Factor out the greatest common factor from each group.
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Group the first two terms and the last two terms.
(9z2+36z)-az-4a
Factor out the greatest common factor (GCF) from each group.
9z(z+4)-a(z+4)
9z(z+4)-a(z+4)
Factor the polynomial by factoring out the greatest common factor, z+4.
(z+4)(9z-a)
Factor by Grouping 9z^2+36z-az-4a

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