Respostas

2013-05-14T23:18:49-03:00

A = 1/2x - 2/3

x = 1/2

 

A = 1/2.1/2 - 2/3

       1/4 - 2/3

        -5/12

 

B = 1/2.(-2/3) - 2/3

       -1/3 - 2/3

          -3/3

           1

 

A - B

-5/12 - 1

 

      -17/12

5 3 5