Jawabanmu

2014-05-12T19:52:16+07:00
Y = a(x - xpuncak)² + ypuncak
32 = a(-1 - 3)² + 0
32 = 16a
a = 2

subtitusi

y = 2 (x - 3)² + 0
y = 2 (x² -6x + 9)
y = 2x² - 12x + 18