Persamaan Kuadrat
• memotong sb x di (-2,0) dan (3,0)
y = a(x - x1)(x - x2)
y = a(x + 2)(x - 3)
• melalui (1,12)
12 = a(1 + 2)(1 - 3)
12 = -6a
a = -2
Persamaan kuadrat
y = -2(x + 2)(x - 1)
y = -2x² - 2x + 4
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Persamaan Kuadrat
• memotong sb x di (-2,0) dan (3,0)
y = a(x - x1)(x - x2)
y = a(x + 2)(x - 3)
• melalui (1,12)
12 = a(1 + 2)(1 - 3)
12 = -6a
a = -2
Persamaan kuadrat
y = -2(x + 2)(x - 1)
y = -2x² - 2x + 4