Respostas

2014-05-18T20:08:27-03:00
3a+3b=
3a= -3b
 a= -3b/3
 a= -b


3a+3b
3.(-b) +3b=
-3b+3b=0
1 5 1
2014-05-18T20:11:27-03:00
3a+3b=3(ab)=3.a+3.b=3 ao quadrado(ab)
2 5 2