SOLUTION: Simplify by removing the factors of one for r^2-81/r^2-18r+81?

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Question 394850: Simplify by removing the factors of one for r^2-81/r^2-18r+81?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Factor the NUM and the DEN, then cancel terms.