They are values that are restricted so that you won't have the denominator 0. A rational expression does not exist when the denominator is = 0. It is called UNDEFINED.
The restrictions on an expression are any values that make the denominator 0.
e.g.
these are the STEPS once again:
- Factor
- Check for restrictions
- Cancel factors
btw....we were asked to do exercise #43. sorry for the late post..... (--,)
