SOLUTION: What is the value of the fraction 15 -x / x +1 undefined?

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Question 180054: What is the value of the fraction 15 -x / x +1 undefined?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
It is undefined when the denominator is equal to zero.
So:
x + 1 = 0
x = -1
.
Therefore, the expression is undefined when x = -1