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What is the sum of all values of $x$ for which the expression $\frac{x-3}{x^2-10x+16}$ is undefined?

 Mar 19, 2020
 #1
avatar+111360 
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\( \frac{x-3}{x^2-10x+16} \)

 

Factor  the  denominator  as   ( x - 8) ( x - 2)

 

Note that  if  x  =  8   or  x  = 2   then the denominator  will be  =  0

 

So......these  are the two values  where the rational function is  undefined

 

And the sum of these  =   10

 

 

cool cool cool

 Mar 19, 2020

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