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Verified answer
Bentuk umum fungsi kuadrat : y = ax² + bx + cy = x² - 9
a = 1, b = 0, c = -9
x = -b/2a = -0/(2.1) = 0
y = 0² - 9 = -9
Jadi titik puncaknya (0, -9)
Jenis titik puncak : karena a > 0 maka titik puncak nya adalah
Titik balik minimum