Question

v =7i -2j, w= -3 - j *** find v.w and v.v

Answer 1

Dot product?
If it's dot product:
v . w = -21i +2j
v . v = 49i +4j

Answer 2

i think its multiply v X w v X v

Answer 3

(v)(w)=(7i-2j)(-3-j)
=-21i-7ij+6j+2j^2
=-7i(3+j)+2j(3+j)
=(-7i+2j)(3+j)

(v)(v)=(7i-2j)(7i-2j)=49i^2-28ij+4j^2