1. The problem statement, all variables and given/known data Consider the operator A and its Hermitian adjoint A*. If [A,A*] = 1, evaluate: [A*A,A] 2. Relevant equations standard rules of linear algebra, operator algebra and quantum mechanics 3. The attempt at a solution [A,A*] = AA* - A*A = 1 A*A = (1+AA*) [A*A,A] = AA*A - A*AA = ??????? How do I even start?