SOLUTION: please help me to understand the GCF of the algebraic expression of 21ab, 14b

Question 218962: please help me to understand the GCF of the algebraic expression of 21ab, 14b
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
please help me to understand the GCF of the algebraic expression of 21ab, 14b
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Each term has a b, and a 7. No other factors are common, so it's 7b.
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Look at it like this:
Factor both terms:
21ab = 3*7*a*b
14b = 2*7*b
Pick out all the factors that are in both terms.
That's 7 and b. That's the GCF.

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