Question

What is the cross product of `<1,2,-4>` and `<-1,-1,2>`?

Answer 1

`vec a x vec b=2j+k`

Explanation:

`vec a=<1,2,-4>" " vec b=<-1,-1,2>`
`vec a x vec b=i(4-4)-j(2-4)+k(-1+2)`
`vec a x vec b=2j+k`