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Y=a(X-Xp)²+Yp
1=a(0-2)²+4
1=a(-2)²+4
1=4a+4
1-4=4a
-3=4a
-3/4=a
Y=a(X-Xp)²+Yp
Y=-3/4(X-2)²+4
Y=-3/4(X²-4x+4)+4
Y=-3/4(X²-4x+4+4)
Y=-3/4(X²-4x+8)
Y=-3/4X²-3X-6
Pilihan D.
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