What is the domain of f(x)=1x2−4f(x) = \frac{1}{x^2 - 4}f(x)=x2−41?
x≠2x \neq 2x=2
x≠−2x \neq -2x=−2
x≠2x \neq 2x=2 and x≠−2x \neq -2x=−2
All real numbers