Hello,

When finding the maximal domains of equations I have always used a basic trial and error (guessing perhaps) method of finding the right numbers, but this takes time. I was wondering if anyone knows a quicker way to do this because i have exams coming up in a week or two and trial and error (or at least how i'm doing it) takes to much time especially in an exam.

For example, (x^2 + 2) / (x^2 - 2)

Is there a soultion that makes these and other domain questions easier then simply trial and error?

Thanks