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29 March, 01:23

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.

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  1. 29 March, 05:04
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    Hello,

    72=8*9=2^3*3^2

    81=9*9=3^4

    GCF (72,81) = 3^2=9

    72+81=2^3*3^2+3^4=3^2 (2^3+3^2) = 9 (8+9)
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