# Math Help - Vectors question

1. ## Vectors question

hey all i am kind of stuck on this one:

If a= 4i-2j+5k, b=4i+3j-3k, c=2i+2j+6k

i) evaluating both sides of the equation verify that ax(bxc)=(a.c)b-(a.b)c
ii) Evaluate the scalar product a.bxc

THNX ALL xxoxox

2. What is the point of this question?
Do you expect someone else to do your calculations for you?

3. Originally Posted by Plato
What is the point of this question?
Do you expect someone else to do your calculations for you?
i dont know how to do it.. yes i do ..

4. Can you caculate $b \times c$?

5. Originally Posted by gina_x
hey all i am kind of stuck on this one:

If a= 4i-2j+5k, b=4i+3j-3k, c=2i+2j+6k

ii) Evaluate the scalar product a.bxc

THNX ALL xxoxox
bxc=24i+30j+2k
a.(bxc)=(4i-2j+5k).(24i+30j+2k)=96i-60j+10k