05-01-2017
Mathematics

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apologiabiology apologiabiology

05-01-2017

ab-ac=a(b+c)
a is a common factor
factor them to find comon factor
15n=3*5*n
18=2*3*3
common factor is 3

15n-18=3(5n)-3(6)=3(5n-6)

first blank is 3
2nd blank is 5n-6

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