Find the number of values of x for which x8−7x5+2x4+2x−1x4−11x3+25x2+39x−126 is undefined.
We only need worry about the x values that make the denominator = 0
This graph shows that there are three of them...
https://www.desmos.com/calculator/hy6vrddzp9
x = -2 x = 3 and x = 7
+847 
