Question

Find the dot product, a • b.

a = 6i + 5j, b = -5i + 4j

Answer 1

i.i=1=j.j
i.j=j.i=0

Answer 2

so the first term is 6i*-5i = -30i.i = -30

Answer 3

You are given two vectors, specified by their vector components.
Please write out the formula for dot product that you'd use in a situation such as this one.

Answer 4

It's good to have a road map in front of you.

Answer 5

so is it -10, then? @mathmale

Answer 6

Still waiting to see the formula or formulas you're using to find the dot product. That's what I meant by "road map."