Jawabanmu

2014-08-28T20:21:21+07:00
4a2b-5ab2
4(-2)2(3)-5(-2)(3)2
-8.6+10.6
-48+60
12
2014-08-28T20:22:35+07:00
4a2b-5ab2 = 4(-2)2(3)-5(-2)(3)2= -48-(-60)=12

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