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y = a(x - xp)² + yp
melalui titik (5,2). Maka x = 5, y = 2
Titik puncaknya (2,-7). Maka xp = 2, yp = -7
y = a(x - xp)² + yp
2 = a(5 - 2)² - 7
2 + 7 = a(3)²
9 = 9a
a = 1
Grafik fungsi kuadrat itujuga melalui titik (-2,p). Berarti x = -2, y = p
y = a(x - xp)² + yp
p = 1(-2 - 2)² - 7
p = (-4)² - 7
p = 16 - 7
p = 9
Jadi, nilai dari p adalah 9