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

The 4x4 matrix with rows v1, v2, v3 and v4 has a determinant of -5. What is the determinant of the matrix with rows v1, v2, 7v3+6v4, 6v3+8v4?

2. Relevant equations

3. The attempt at a solution

I tried doing -5x7x8=-280 but its saying its wrong. I don't understand why. I'm using the properties of determinants of matrices.

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# Homework Help: Matrix determinant problem

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