# What is the dot product of <-8,1,2 >  and <-2,-8,-1 > ?

$a . b = 6$
$\vec{a} = < - 8 , 1 , 2 > \text{ } \vec{b} = < - 2 , - 8 , - 1 >$
$a . b = 16 - 8 - 2$
$a . b = 6$