Question

i)When an identity is stated in terms of "x" what does say about the number x?
ii)(generally) what are identities about?
please help !!!!!
Steve
the identity must be true for any value of x. That is, for <b>all</b> values of x, whatever you choose.

The identity does not say anything about the number x. If there is any value which does not satisfy the equation, then it is not an identity.