SOLUTION: r^3-5r/r^2-9 find all the numbers for which the rational expression is undefined.

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Question 285619: r^3-5r/r^2-9 find all the numbers for which the rational expression is undefined.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
r^3-5r/r^2-9 find all the numbers for which the rational expression is undefined.
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r^3-5r/r^2-9
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Factor:
(r(r^2-5))/[(r-3)(r+3)]
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Undefined for r = 3 and for r = -3
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Cheers,
Stan H.