Consider the operator A and its Hermitian adjoint A*.
If [A,A*] = 1, evaluate: [A*A,A]
standard rules of linear algebra, operator algebra and quantum mechanics
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?