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Colt1911 [192]
4 years ago
9

Using the GCF you found in Part B, rewrite 72 + 81 as two factors. One factor is the GCF and the other is the sum of two numbers

that do not have a common factor. Show your work. (4 points)
Mathematics
1 answer:
konstantin123 [22]4 years ago
8 0

72|2\\36|2\\18|2\\.\ 9|3\\.\ 3|3\\.\ 1|\\\\72=2\cdot2\cdot2\cdot\boxed{3}\cdot\boxed{3}\\\\81|3\\27|3\\.\ 9|3\\.\ 3|3\\.\ 1|\\\\81=\boxed{3}\cdot\boxed{3}\cdot3\cdot3\\\\GCF(72,\ 81)=\boxed{3}\cdot\boxed{3}=9\\\\72=9\cdot8\\81=9\cdot9\\\\\boxed{72+81=9(8+9)}

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