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Verified answer
X^2 - 4x -1 = 2x - 10x^2 - 6x + 9 = 0
(x-3)(x-3) = 0
Jadi
x = 3
x² - 4x - 1 = 2x - 10
x² - 6x + 9 = 0
(x - 3) (x - 3) = 0
x = 3 dan x = 3