How do you find all the values that make the expression undefined: #(3x^2 - 3)/(6x - 6)#?
For this expression to be undefined, your denominator cannot be zero, as it's an indetermination when you have something divided by zero.
Thus, this expression becomes undefined when
In this case, by the way, we'd have an interesting topic in calculus:
So, your answer: this function becomes undefined only when