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(x + 3)(x - 3)/ (x + 3)(x - 1)
x + 3 = 0
x = -3
x - 3 = 0
x = 3
x + 3 = 0
x= -3
x - 1 = 0
x = 1
HP = (-3, 1, 3)
(x+3) (x-3) / (x+3) (x-1)
coret (x+3) dgn (x+3)
sisa x-3 / x-1