Question

Given the vectors u=<2,2>, v=<−3,4>, and w=<1,−2>, how do you find (u⋅v)−(u⋅w)?

Answer 1

u.v= 2*-3 + 2*4 = -6+8 = 2

u.w=2*1 + 2*-2 = 2-4 = -2

so our answer is 2-(-2)= 4