Jawabanmu

2014-03-24T17:52:34+07:00
Puncak = (2,-3)
melalui (-2,-11)
-11 = a(-2-2)^{2} + (-3) \\ -11 = 16a - 3 \\ 16 a = -8 \\ a = - \frac{1}{2}
persamaan kuadrat :
y = - \frac{1}{2}(x-2)^2 - 3 \\ y = - \frac{1}{2}(x^2-4x+4) -3 \\ y = -\frac{1}{2}x^2 +2x  -5
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