Jawabanmu

2014-08-10T19:25:51+07:00
Jawaban paling cerdas!
2014-08-10T19:37:33+07:00
= -2a-abc+6 - (-2a-3bc+3)
= -2a-abc+6 + 2a+3bc-3
= -2a+2a-abc+3bc+6-3
=-abc+3bc+3

caranya itu :)