SOLUTION: n^3-n9/n^2-4 find all the numbers for which the rational expression is undefined.

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Question 401139: n^3-n9/n^2-4
find all the numbers for which the rational expression is undefined.
Answer by algebrahouse.com(1659) About Me  (Show Source):
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n^3-n9/n^2-4
find all the numbers for which the rational expression is undefined.

Undefined means the denominator would be zero.

Set the denominator equal to 0, and solve for the variable.
n^2 - 4 = 0 {set denominator equal to 0}
n^2 = 4 {added 4 to both sides}
n = ±√4 {took square root of both sides}
n = ±2 {square root of 4 is 2 and -2}
Therefore n being 2 or -2 would make the expression undefined.
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