Question

How do you find the component form of `v=u-2w` given `u=2i-j, w=i+2j`?

Answer 1

`v=-5j`

Explanation:

As `u=2i-j` and `w=i+2j`

and `v=u-2w`, it can be expressed as

`v=(2i-j)-2(i+2j)`

= `2i-j-2i-4j`

= `0-5j`