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x² - x - 7 = 2x + 3
x² - x - 2x - 7 - 3 = 0
x² - 3x - 10 = 0
(x + 2)(x - 5) = 0
x + 2 = 0 atau x - 5 = 0
x = -2 atau x = 5
tipot (-2,0) dan (5,0)