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Factor out the greatest common factor. 5a(a + 3b) + 4(a+ 3b)
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5a^2+15ab+4a+12b
Then factor
how do u factor
(5a +4)(a+3b)
5a^2+4a becomes a(5a+4) then 15ab+12b becomes 3b(5a+4) Then we take out the (5a+4) so we get (5a+4)(a+3b)
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