Materi : Bentuk dan Persamaan Kuadrat
Melalui Titik Puncak ( Xp,Yp ) = ( -1,3 )
Yp = D/-4a
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A. ( 4 - 20 )/-4(1) = (-16)/(-4) = -4 ×
B. ( 16 - 40 )/-4(2) = (-24)/(-8) = 3 ✓
C. ( 36 - 40 )/-4(2) = (-4)/(-8) = ½ ×
D. ( 256 - 160 )/-4(8) = 94/-32 = - 47/16 ×
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