Question

Find the value of determinant :

`|(2"i", 3),(4, -"i")|`

Answer 1

`|(2"i", 3),(4, -"i")|`

= 2i(– i) – 4(3)

= –2i² – 12

= –2(– 1) – 12  ...[∵ i² = – 1]

= 2 – 12

= – 10