Determinant of a 2x2 Matrix in 2 Minutes

The determinant of a 2 by 2 matrix for matrix

|A|=|a b|
|c d| =ad-bc

The determinant of matrix A is ad-bc (the difference of the product of the two diagonals).

0:00 Thumbnail Example
0:30 General formula for determinant of 2 by 2 matrix
0:55 Examples using general formula

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