Respostas

2014-05-22T11:09:17-03:00
5x.y-x para x=2 e y=-1
5.2.(-1) -2
10.(-1) - 2
-10-2
= -12
2014-05-22T11:10:40-03:00
5*2*(-1)-2= 
10*(-1)-2
10*(-3)=
-30