Find the gcf of 72 and 81. show your work. 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.

The greatest common factor of 72 & 81 is 9 because both numbers are equally divisible by 9 (ex:8x9=72 & 9x9=81). No other number greater than 9 equally divides between the two terms. That's the answer to part 1. I'll keep looking for the answer to part 2.