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y = a(x - xp)² + yp
2 = a(5 - 2)² - 7
2 = a(3)² - 7
2 = 9a - 7
9 = 9a
a = 1
Grafik itu juga melalui titik (-2, p)
y = a(x - xp)² + yp
p = 1(-2 - 2)² - 7
p = (-4)² - 7
p = 16 - 7
p = 9
Jai, nilai p adalah 9