# Zero determinant for a 12×12 matrix [closed]

I know the determinant of this matrix is zero. Can someone explain how to obtain it?

## closed as off-topic by Andrés E. Caicedo, Parcly Taxel, 6005, choco_addicted, Cameron WilliamsOct 1 '16 at 4:29

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• Try rearranging rows and columns. If any two rows or columns are same , then determinant is 0 – Fawad Oct 1 '16 at 4:15

Step 1 :

Divide $C_5$ with 2.

Step 2 :

Since $C_5$ and $C_{11}$ are same, determinant of given matrix is 0.

Why determinant is zero when two rows or columns are same?