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Anonymous
2ab - 6ac + 3b - 9c
= b(2a + 3) - 3c(2a + 3)
= (b - 3c)(2a + 3)
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2ab - 3b2 - 3b + 2a does not have a solution, as it is not an equation.
(a+b)(3b+1)
(3b + 7x)(3b + 7x) or (3b + 7x)2
(3b - 4)(3b - 4)
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