What is the cross product of <5, 2 ,5 > and <4 ,1 ,3 >?

Apr 14, 2016

$A X B = i + 5 j - 3 k$
$A X B = i \left(2 \cdot 3 - 5 \cdot 1\right) - j \left(5 \cdot 3 - 5 \cdot 4\right) + k \left(5 \cdot 1 - 2 \cdot 4\right)$
$A X B = i \left(6 - 5\right) - j \left(15 - 20\right) + k \left(5 - 8\right)$
$A X B = i + 5 j - 3 k$