I need to find the limit as x approaches 3. I've simplified it to a number of other forms, but I can't get it into a form where x=3 doesn't equate to an undefined value. I know that the answer is -(1/16). Can anyone help point me in the right direction?
Whenever you see a problem like this, try to simplify it to a rational function (quotient of two polynomials, such as , using various strategies like common denominators, etc. Then pull out any common factors. (You may need to find the roots.)