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Verified answer
Bab Persamaan KuadratMatematika SMP Kelas VIII
x² - 2x - 15 = 0
x² + 3x - 5x - 15 = 0
x (x + 3) - 5 (x + 3) = 0
(x + 3) (x - 5) = 0
x + 3 = 0 atau x - 5 = 0
x = -3 x = 5