This video explains how to find the determinant of a 4x4 matrix. My Website: https://www.video-tutor.net Patreon Donations: https://www.patreon.com/MathScienceTutor

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So we want to find the determinant of A. Let me rewrite A right here. It's 1, 2, 2, 1, 1, 1, 2, 4, 2, 2, 7, 5, 2, minus 1, 4, minus 6, 3. Now let's try to get this into upper triangular form. So let's replace the second row

Matrix A A is a square 4×4 matrix so it has determinant. Here we have no zero entries, so, actually, it doesn’t matter what row or column to pick to perform so called Laplace expansion. Let it be the first column. It means that we set j=1 j =

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