What is the cross product of $<-3,4, 8 >$ and $<-9,3,1>$ ?

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Answer 1 · 2016-03-05T12:42:35

$vec a x vec b=20i-69j+27k$

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$vec a=<-3,4,8" "vec b=<-9,3,1>$
$vec a x vec b=i(4-24)-j(-3+72)+k(-9+36)$
$vec a x vec b=20i-69j+27k$

What is the cross product of <-3,4, 8 ><-3,4, 8 > and <-9,3,1><-9,3,1>?