What is the cross product of $(4 i + 4 j + 2 k)$ $(4 i + 4 j + 2 k)$ and $(- 5 i + 12 j + 2 k)$ $(-5i + 12j + 2 k)$ ?

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Answer 1 · 2016-02-06T19:55:46

I found: $(- 16 \to i - 18 \to j + 68 \to k)$ $(-16veci-18vecj+68veck)$

I would use the matrix notation and evaluate the determinant:
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What is the cross product of (4 i + 4 j + 2 k)(4i+4j+2k)(4 i + 4 j + 2 k) and (-5i + 12j + 2 k)(−5i+12j+2k)(-5i + 12j + 2 k)?