Compute the determinant using a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column. StartAbsoluteValue Start 3 By 3 Matrix 1st Row 1st Column 3 2nd Column 0 3rd Column 3 2nd Row 1st Column 2 2nd Column 3 3rd Column 3 3rd Row 1st Column 0 2nd Column 4 3rd Column negative 2 EndMatrix EndAbsoluteValue

Step-by-step explanation:

It is given that

By cofactor expansion across the first row, we get

Therefore, the value of determinant is -30.

By cofactor expansion across the second column, we get

Therefore, the value of determinant is -30.

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step-by-step explanation:

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