Find the value of x for which the expression (x^2 - 4)/(x - 2) is undefined.
Correct: C
The given expression is (x^2 - 4)/(x - 2). Factoring the numerator gives ((x + 2)(x - 2))/(x - 2). The expression is undefined when the denominator (x - 2) equals zero, which occurs when x = 2.