Question

Find d:

d=| 5 1 |
|-1 10 |
D= 51

[2 4 ]
[-3 9]
the determinant of the above matrix: 30

Answer 1

D = 51, other = 30

Explanation:

d = | 5 1 |

|-1 10|

D = (5 x 10) - ( 1 x -1) = 50 + 1 = 51

| 2 4|

|-3 9|

(2 x 9) - (4 x -3) = 18 + 12 = 30