SOLUTION: Find all the numbers which make the rational expression undefined: p^3-6p/p^2-4

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find all the numbers which make the rational expression undefined: p^3-6p/p^2-4      Log On


   

Question 422883: Find all the numbers which make the rational expression undefined:
p^3-6p/p^2-4
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
This one is MUCH easier than it looks!! You have to ask yourself, "What makes a fraction UNDEFINED?" The answer is "DENOMINATOR = ZERO."

So, make the denominator equal to zero (which we ALL know is NEVER really allowed in math!!), and solve the equation.

x%5E2+-+4+=+0
%28x-2%29%28x%2B2%29=0

x= 2 or x= -2

Dr. R^2