Question

Given that e= 8i – 6j and f= 4i + 11j, find 5f – 2e.

Answer 1

41 + 67j

Explanation:

I took the quiz

Answer 2

The Solution:

Given:

`\begin{gathered} e=8i-6j \\ f=4i+11j \end{gathered}`

Required:

Find 5f - 2e

`5f=5(4i+11j)=20i+55j`
`2e=2(8i-6j)=16i-12j`
`5f-2e=20i+55j-(16i-12j)=20i+55j-16i+12j`
`5f-2e=(20-16)i+(55+12)j=4i+67j`

Answer:

`4i+67j`