Answer:
Step-by-step explanation:
The determinant of a matrix is a special number that can be calculated from a square matrix.
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To work out the determinant of a 3×3 matrix:
Multiply a by the determinant of the 2×2 matrix that is not in a's row or column.
Likewise for b, and for c.
Sum them up, but remember the minus in front of the b.
