Im not quite sure how to find the domain on the function f(x)=the square root of x squared-4
The domain is all values of x such that
This graph has x-intercepts are -2 and +2.
The domain will be the values to the left of -2 and to the right of +2. The values between -2 and +2 are not part of the domain. For instance, zero is not in the domain.