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Mathematics 9 Online
OpenStudy (anonymous):

(r^3-4r)/(r^2-81)

OpenStudy (mertsj):

What are you supposed to do with these binomials? Multiply them? Factor them?

OpenStudy (saifoo.khan):

(r^3-4r)/(r^2-81) write the numbers which make this undefined.

OpenStudy (saifoo.khan):

Answer = 9, -9

OpenStudy (anonymous):

find all number for which the rational expression is undefined

OpenStudy (mertsj):

Just what saifoo said

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