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Find the product of all x such that the expression (x^2 - 4)/(x^2 - 1) is undefined.

 Apr 23, 2022
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It's undefined  when x^2  -1  = 0

 

So

 

x^2  -1    = ( x - 1) (x + 1)   =  0

 

Setting both factors  =  0   and  solving for x produces   x = 1   or  x  = -1

 

The product of these =   1 * -1     = -1

 

 

cool cool cool

 Apr 23, 2022

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