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-5 = -1
(4x2-24x+36)-4 = 0
4x2-24x+32 = 0
x2-6x+8 = 0
(x-4)(x-2) =0
x=4 atau x=2
(2x-6)² - 5 = -1
4x² - 24x + 36 - 5 + 1 = 0
4x² - 24x + 32 = 0 --> kedua ruas dibagi 4
x² - 6x + 8 = 0
(x-4) (x-2) = 0
x = 4 atau x = 2
semoga membantu ya :)