Now,

We know that a determinant of a 3 x 3 matrix is calculated as



= 2[0 – (-1)(-5)] + 1[0 – (-1)(3)] – 2[0 – 3(2)]


= 2[0 – 5] + 1[0 + 3] – 2[-6]


= 2[-5] + 1[3] -2[-6]


= -10 + 3 + 12


= 5


The determinant of the above matrix is 5.


5
1