SOLUTION: what is the LCM of (1+3r),(1-9r^2), and (1-3r)

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Question 807030: what is the LCM of (1+3r),(1-9r^2), and (1-3r)
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
Answer: (1-9r^2)
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