How do you find the determinant of $((1, 2, 4), (3, 1, 3), (0, -2, 0))$ ?

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Answer 1 · 2016-06-08T17:07:42

I found: $-18$

I would use a trick using the third line with the 2 zeroes to simplify the evaluation:
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How do you find the determinant of ((1, 2, 4), (3, 1, 3), (0, -2, 0))((1, 2, 4), (3, 1, 3), (0, -2, 0))?