Determinant of 3×3 matrix

Suppose you want to calculate the determinant of 3×3 matrix.

How to calculate Determinant of 3×3 Matrix Using Row Expansion

The naive solution can be row expansion or column expansion. In the next movie we see how to calculate determinant of 3×3 matrix using first row expansion.

how to calculate Determinant of 3×3 Matrix using the Sarrus rule

The sarrus rule is simple method to calculate determinant of 3×3. It allows to construct the above formula of the first row expansion we see above. However, It is much simpler to remember. Let’s see the Sarrus rule in action:

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