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x² - 5 = 2x + 3
x² - 2x - 8 = 0
(x - 4)(x + 2) = 0
x = 4 ; x = -2
x = 4
y = 2 . 4 + 3 = 11
x = -2
y = 2 . (-2) + 3 = -1
Titik potong
(4,11) dan (-2,-1)