Originally Posted by
colerelm1 The information that was given to me was the following:
The following are all vectors:
a, b, c, d
k = (a+b) x (c+d) Mr F says: I assume the important red product was missing ....?
prove: k = (a x c) + (a x d) + (b x c) + (b x d)
Any help would be appreciated. Thanks!