Question

U = 6i – 10j
g= -81 – 11j
Find: -3u + 5g

Answer 1

`-3u + 5g =-58i -25j`

Explanation:

Given

`u = 6i - 10j`

`g=-8i - 11j`

Required

`-3u + 5g`

We have:

`-3u + 5g`

This gives:

`-3u + 5g = -3(6i - 10j) + 5(-8i - 11j)`

Open bracket

`-3u + 5g = -18i + 30j - 40i - 55j`

Collect like terms

`-3u + 5g = -18i - 40i+ 30j - 55j`

`-3u + 5g =-58i -25j`