SOLUTION: I need help with solving this equation.Find all numbers for which the rational expression is undefined n^3-7n/n^2-4 (this problem is division)

Question 241503: I need help with solving this equation.Find all numbers for which the rational expression is undefined
n^3-7n/n^2-4 (this problem is division)
Answer by College Student(505) (Show Source): You can put this solution on YOUR website!
In order for a fraction to be undefine, its denominator would equal to zero. So, let the denominator (by itself) equal to zero and find the solution(s).
.

Take the square root on both sides of the equation to determine the value of n.

Since the square root of a number raised to the 2nd power cancel each other, we can re-write the equation like this:

This will yield two possible answers:
n=2 and n=-2
.
Check:

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