SOLUTION: List all numbers for which the rational expression is undefined: x^2-4 __________

SOLUTION: List all numbers for which the rational expression is undefined: x^2-4 ___________ x^2-8x+15 Thanks in advance :)

Question 327563: List all numbers for which the rational expression is undefined:
x^2-4
____________
x^2-8x+15
Thanks in advance :)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
List all numbers for which the rational expression is undefined:
x^2-4
____________
x^2-8x+15
=====================
The expression is undefined when the denominator is zero.
---------------
Solve: x^2-8x+15 = 0
Factor:
(x-5)(x-3) = 0
---
Undefined when x = 3 and when x = 5
======================================
Cheers,
Stan H.
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