Find all values that make the expression undefined.

Question

x² -81/x² -12x+32

 

How do i solve this equation step by step?

Answer 1

First, completely factor the expression.

 

(x - 9)(x + 9) / (x - 8)(x - 4)

 

 

Set the denominators factors equal to zero.

 

x - 8          and     x - 4 = 0

 

 

Solve for x.  These x values are the restricted values.