Question

Given u = (2, -8) and v = (8, -2), what is u times v?

Answer 1

`u\cdot v=32`

Explanation:

Assuming
`u` and
`v` are vectors, their dot product is
`u\cdot v` where
`u_1v_1 + u_2v_2`:

`u\cdot v=u_1v_1+u_2v_2=(2)(8)+(-8)(-2)=16+16=32`

Therefore,
`u\cdot v=32`