Question

plz answer
as fast as possible​

Answer 1

Answer= b.

A=3i+j+2k

B=2i-2j+4k

AxB= i((1*4)-(2*(-2)))+j((2*2)-(3*4))+k((3*(-2))-(1*2))

     = i(4+4)+j(4-12)+k(-6-2)

     =8i-8j-8k

Magnitude=√8²+8²+8²

=√64+64+64

=√192

=8√3