(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The matrix is in the following form

2 4 -2 -2

1 3 1 2

1 3 1 3

-1 2 1 2

2. Relevant equations

3. The attempt at a solution

I subtracted equation 2 from equation 3 and came up with the following matrix

2 4 -2 -1

1 3 1 2

0 0 0 1

1 -2 1 2

It seems to make sense to pivot around the 1 in the third equation. I tried it and got 5 which I know is not that answer using an online Matrix calculator and my professor.

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# Determinant of a 4x4 Matrix

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