Question

3) Find the value of the determinant |

5 3

−7 −4

|

a) -1 b) 10 c) 12 d)​

Answer 1

Answer :

$|5 \: \: \: \: \: \: \: \: \: \: \: \: \: \: 3| \\ | - 7 \: \: - 4 \:|$

$(5 \times - 4) - ( - 7 \times 3)$

$- 20 - ( - 21)$

$- 20 + 21$

$1$

The determinant is 1