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19-09-2017
Mathematics

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What is the sum of numbers as a product of their GCF 45+60

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19-09-2017

find the prime factorization

45=3*3*5
60=2*2*3*5
GCF=3*5=15

45=3*15
60=4*15

remember
ab+ac=a(b+c) so
45+60=15(3)+15(4)=15(3+4)=15(7)=105

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