SOLUTION: Find all numbers for which the rational expressions is undefined (n^3-2n)/n^2-4

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Question 478976: Find all numbers for which the rational expressions is undefined
(n^3-2n)/n^2-4
Answer by lwsshak3(11628) About Me  (Show Source):
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Find all numbers for which the rational expressions is undefined
(n^3-2n)/n^2-4
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The function is undefined when the denominator=0, so set the denominator=0, then solve for the variable.
n^2-4=0
(n+2)(n-2)=0
n≠-2
or
n≠2
ans:
expression is undefined when x=±2