Note that 2 is a scalar. What happens to direction when you multiply (scalar * vector) ?
Note that you asked for diagrams.
I started to think about drawing htese like the last lot but you demonstrated some ability with algebra.
The foregoing discussion shows how much easier algebra is in this 3 dimensional case.
Do you still want diagrams ar can you now draw your own?
One thing you suggested when I asked what A, B and (A-B) are was that they are unit vectors.
Do you still think this or can you see why none of them are unit vectors?