Since f(x) = -2, it means that for any input value x other than 0, the output will always be -2. So, the input value can be any real number other than 0, and the output will be -2.
Is this ok?
Therefore, there is no specific input value other than 0 for which f(x) = -2. For any input value x other than 0, the output will be -2.