Hey mzer!
This is the question you have,”A iff B is equivalent to (A and B) or (not A and not B)
What you have is called a bi-conditional. The connective that gives it away is the word “iff.” “iff” means “if and only iff.” Now what your question basically states is what the logical notation is equivalent to in another form of logical notation… only it’s in English.
If you have any questions or more explanation, I'll be happy to answer any of your questions.