Jawabanmu

2014-09-12T18:20:06+07:00
2014-09-12T18:27:34+07:00
Itu (2ab) ^2 yah ?
berarti (2.(-2)(3))^2 - (2.(2)(-4)) + (4.(-2)(-4)) - (5.(-2)(3)(-4))
= (-12)^2 - (-36) + (64) - 120
= 144 + 36 + 64 - 120
= 124

Trus d=5 itu buat apa ?