Determinant of a 4x4 matrix

Last updated: Jan. 2nd, 2019
  Find the determinant of a 4x4 matrix
determinant of a 4 x 4 matrix

  Explanation

  The cofactor expansion of $A$ along the first column is

  Calculating the 3x3 determinant in each term,
From these, we obtain
Example:
  Find the determinant of
as in the above method.
  The cofactor expansion of $A$ along the first column is
Calculating the 3 by 3 determinant in each term,
We obtain
Calculator
  Enter a 4x4 matrix and press "Execute" button. Then the determinant is displayed.
1 2 3 4
1
2
3
4
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