(u-5v)x(u+4v)
= uxu - 5vxu + 4uxv - 20vxv
= 9uxv (why?)
This is a cross product problem:
Given uxv=<2,-3,0>
find (u-5v)x(u+4v)
I appreciate your help Thank you!
2 answers
Steve before you start asking why may I tell you that you completely did not understand the question this is the cross product between two vectors. x is not a variable it is a symbol of operation. So try again, you cannot just distribute.