1. The problem statement, all variables and given/known data So I am not sure how to multiply these two (A*R^2) together. 2. Relevant equations A=( x^2 + y^2 + z^2 ) (xe + y e + z e ) Where x represents the three vector compones I also have R^2=x^2+y^2+z^2 3. The attempt at a solution Is the product of A (x^3e + y^3 e + z^3 e )? If so why is that? I would think because of some vector rule I am not sure of.