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HELP ME OUT PLEASE SOLVE IT WITH FACTOR

Factor the GCF out of this given expression:Please explain the steps on you got it so as i can practice with it for future similar problems
 
(1) a^7b^8+a^5b^6-a^3b^2
 
(2) -18a^5-30a^3+24a^2
 
(3) 6x(x-8)-5(x-8)

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Jim S. | Physics (and math) are fun, reallyPhysics (and math) are fun, really
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Hi Ma,
        Lets start with #3 first
 
you see that the term (x-8) is common (the greatest common factor) to both terms in the expression 6x(x-8)-5(x-8) so if we factor it out we have (x-8)(6x-5)
 
2. -18a5 -30a+24a2    the greatest common factor is 6ain this case it's the term with the smallest exponent so we have 6a2(-3a3-5a+4)    make sense?
 
1. The GCF here is a3b you try the rest.
 
Regards
Jim