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Determinant

The determinant is a special number (positive, negative or zero) that can be calculated from a matrix. The matrix has to be square (same number of rows and columns).

Matrix 2x2

Matrix 3x3

EXERCISES:

Calculate the determinant

1.

matrix A 3x3 New.jpg

Answer: -30

2.

matrix B 3x3 New.jpg

Answer: 240

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