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Anonymous
do you mean
12a3 - 5a2b - 2b2 ??
= 12a3 + 8a2b - 3a2b - 2b2 then group 1st 2 terms and last 2 and use GCF
= (12a3 + 8a2b) + ( - 3a2b - 2b2)
= 4a2(3a + 2b) + (-b)(3a2 +2b) not much help, but that's all folks
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