Question

(Uniform) sejam as matrizes A= -1 0 1 / 0 2 -2 e B = 2 -1 / 1 2 / 0 1 o determinante da matriz A . B é :

Answer 1

Resposta:

|-1 0 1|. |2 -1|

|0 2 -2| × |1 2|

|0 1|

(-1.2)+0.1+1.0. (-1).(-1)+0.2+1.1

0.2+2.1+(-2).0. 0.(-1)+2.2+(-2).1

-2+9+9. 1+0+1

0+2+0. 0+4+-(+2)

-2+18. 2

2. 4-2

|16 2|

|2 2|