SOLUTION: List all numbers for which the rational expression is undefined x^2-4/x^2-8x+15

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Question 315759: List all numbers for which the rational expression is undefined
x^2-4/x^2-8x+15
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Undefined if the denominator is zero
so we set x^2-8x+15 to zero and solve for x
.
x^2-8x+15 = 0
(x-5)(x+3) = 0
x = {-3, 5}