Jawabanmu

2013-12-08T12:26:18+07:00
2013-12-08T12:27:53+07:00
(a+2b) ^{2} = (a+b2b) (a+2b)
a ^{2} + 2ab + 2ab+b ^{2} 

a ^{2} +4ab+b ^{2}
jwbnnya sma dg rama