Jawabanmu

Jawaban paling cerdas!
2014-05-23T14:50:12+07:00
1. 2√3 +3√3 = 5√3
+_ --> artinya plus minus
2. D1,2 = (-b +_ √b²-4ac) / 2a
 D1,2 = (-2+_ √4-(4x1x-15))/2x1
 D1,2 = -1 +_ 4
Jadi D 1= -1 + 4 = 3 ; D 2 = -1 -4 = -5
1 5 1
2014-05-23T14:51:49+07:00
1.9×2=18+27=45
2.×2-2×=15
  ×=15

maaf kalok salah