Rumus yang digunakan:
(x - x₁)(x - x₂) = 0
Misal: x₁ = 3 dan x₂ = -2
Maka:
(x - 3)(x - (-2)) = 0
(x - 3)(x + 2) = 0
x² + 2x - 3x - 6 = 0
x² - x - 6 = 0
Jadi, persamaan kuadratnya x² - x - 6.
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Rumus yang digunakan:
(x - x₁)(x - x₂) = 0
Misal: x₁ = 3 dan x₂ = -2
Maka:
(x - x₁)(x - x₂) = 0
(x - 3)(x - (-2)) = 0
(x - 3)(x + 2) = 0
x² + 2x - 3x - 6 = 0
x² - x - 6 = 0
Jadi, persamaan kuadratnya x² - x - 6.