Question

Hitung determinan matriks
B = ( 4 0 7 )
( 5 1 -2 )
( 0 3 -1 )

Answer 1

4|1 -2| - 0|5 -2| + 7|5 1|
  |3 -1|     |0 -1|      |0 3|

= 4(-1.1 - 3.-2) - 0 + 7(3.5 - 0.1)
= 4(-1 + 6) + 7(15)
= 4(5) + 105
= 125