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If #A= <-2 ,4 ,3 ># and #B= <-1 ,2 ,8 >#, what is #A*B -||A|| ||B||#?

1 Answer

Oct 14, 2016

#34-sqrt(29*69)#

Explanation:

#A.B=2+8+24=34#

#∥A∥ =sqrt(4+16+9)=sqrt29#

#∥B∥=sqrt(1+4+64)=sqrt69#

#A.B- ∥A∥∥B∥=34-sqrt(29*69)#

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