$\"\"$

\

The determinant is $\"\"$ .

\

$\"\"$ (Original determinant)

\

$\"\"$ (Apply determinant formula: $\"\"$ )

\

$\"\"$ (Multiply)

\

$\"\"$ (Subtract: $\"\"$ )

\

$\"\"$ .

\

$\"\"$

\

The determinant value is $\"\"$ .