Question

Vector A= 4,7 i + 1.0 j and vector B = 3.0 i + 3,1 j. What is vector = (A- B).A ?

need help please

Answer 1

neeed hlppppp please

Answer 2

A-B = (4.7-3.0)i + (1.0-3.1)j = 1.7i - 2.1j
(A-B)•A = ___
or.
(A-B)•A = A•A - A•B = 4.7^2+1.0^2 - ((4.7*3.0)i + (1.0*3.1)j) = _____