Question

me ajudem matriz det

Answer 1

(-2) 3 4 (-2) 3

(-1) 1 x (-1) 1 = 8

3 1 2 3 1

(-2)× 1 ×2+ 3.X.3+4.(-1).1 - 3.(-1).2 - (-2).x.1- 4.1.3=8

-4+9x-4+6+2x-12=8

11x-14=8

11x=8+14

11x=22

x=22/11 = 2