Question

find the values of the determinant of the following matrics​

Answer 1

Answer:

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.

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Answer 2

Answer:

FINDING THE DETERMINANT OF' A MATRIX

Multiply each element in any row or column of the matrix by its cofactor. The sum of these products gives the value of the determinant.