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OpenStudy (anonymous):
Subtract and simplify. 8/4r^2-4r - 9/4r-4
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OpenStudy (tkhunny):
Think about "like terms". Don't mess with things that are not "like terms". What are the "like terms" in the two expressions?
OpenStudy (anonymous):
I got 2/r(r-1) - 9/4(r-1)
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