Respostas

2013-04-28T02:21:50-03:00

3 A=  [-12  0]

            [3 -18]

 

 

2C  = [6  20]

          [ -12  0]

 

2C+ B = [9 30]

                [-18 0]

 

3 A-  X =2C+ B

 

 

 

Resolvendo, temos:

 

[-12 0]  + X =  [9 30]                  X= [ 9 – (-12)   30 – 0]

[3 -18]              [-18 0]                       [ -18 -3    0 – (-18)]

 

 

X= [21  30]

       [-21 -18]