factor the polynomial

Desan65

New member
Joined
Mar 12, 2012
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15
Factor each polynomial: -6mn + 4m + 18n - 12
Please solve step-by step. I get the positives and negatives incorrectly
 
2(-3mn + 2m + 9n - 6)
-3n(m-3) + 2 (m-3)
My answer: 2(m-3) (2-3n)

But the book says the answer is -2(m-3) (3n-2)!
 
Still some problems!

I still seem to get the positives and negatives mixed up.
Problem: 2b²+10b+12

The factors are 12 and -2

2b²+12b-2b+12
2b(b+6) -2(b-6)
the last equation should be (b+6) same as the first one, but why?
 
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