Question

Calcule os determinantes [3 4 -2][-1 1 3][2 5 1]

Answer 1

det A= 
[(3.1.1)+(4.3.2)+((-2).(-1).5)] -[((-2).1.2)+(4.(-1).1)+(3.3.5)]=
[3+24+10]-[-4+-4+45]=
37-37=
0