Understanding Cross Product: A Refresher for 3(A x B) Calculation

[camino]

Homework Statement

I simply forget how to cross product if you have:

3(A x B)

Would it be 3A x B

or

A x B then take that result and multiply by 3?

 

[rock.freak667]

r(axb) = (ra)xb = ax(rb)


I believe it works like that for r=constant.

 

[camino]

Thank you that was my original thought.