i believe this has something to do with crossproducts.

for the part below use:

u= 8i +2j and v = 2i+j-k

find the area of the parallelogram formed by u and v

ok so that was the problem

i started it by trying to find the P, Q, and R.

i got P(8,2,0) Q(2,1,0) and R(0,-1,0)

are the points correct for P Q and R

i m kinda stuck here.