# Quick derivation question Quantum Mechanics

1. Feb 1, 2015

### rwooduk

1. The problem statement, all variables and given/known data
Having one of those days where nothing makes sense, here is the derivation:

how does he get the two circled terms from what he's derived above?

2. Relevant equations
N/A

3. The attempt at a solution
I tried substitution but get nowhere I just cant see how the early expressions help in getting the circled expressions.

once again, any pointers in the right direction would be appreciated

2. Feb 1, 2015

### Fightfish

Er...isn't it just a matter of multiplying both sides by $i \hbar$?

3. Feb 1, 2015

### rwooduk

thanks i'll go shoot myself now.

appreciated ;-)