- #1

jdawg

- 367

- 2

## Homework Statement

For the following three vectors, what is 2C*(3AxB)

A=3i+3j-4k

B=-3i+2j+3k

C=-6i-8j

**All of the capital letters are vectors**

## Homework Equations

## The Attempt at a Solution

2A=2(3i+3j-4k)

=6i+6j-8k

2AxB=(6i+6j-8k)*(-3i+2j+3k)

(6i)(-3i)+(6i)(2j)+(6i)(2k)+(6i)(-3i)+(6j)(2j)+(6j)(3k)+(-8k)(-3i)+(-8k)(2j)+(-8k)(3k)

(12k)+(-12j)+(18k)+(18i)+24j)+(16i)

34i+12j+30k

I don't really know what to do next, honestly I don't really understand what I did to get that far. I found an example problem and just kind of plugged stuff in... If you could explain to me how to work this problem that would be great!