# Evaluate scalar triple products

Gold Member

Here is the determinant for axb:
w x y z
1 -2 3 -4
-1 2 4 -5

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Gold Member
My confusion is how to get a 3x3 determinant when the vectors a, b and c are presented as being in R^4.
For example, when i make the determinant for c.(axb), i get:

c1 c2 c3 c4
a1 a2 a3 a4
b1 b2 b3 b4

But it's not possible to evaluate such a 3x4 determinant, right? And the question is requesting that i evaluate a 3x3 determinant.

Any ideas?

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HallsofIvy