math
posted by luke .
Which expression shows 27 + 36 as the product of their greatest common factor and the sum of two whole numbers with no common factor?
7(4+5)7(4+5)
9(4+5)9(4+5)
9(3+4)9(3+4)
7(3+6)7(3+6)

math 
Steve
well, what is their greatest common factor?
Hint 7 does not divide either 27 or 36.
and why did you write each answer twice?
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