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kalau sama dengan,
1) 2x^ + 3x - 9 - x^ - 2x + 3 = 0
x^ - x - 6 = 0
(x- 3) (x + 2)
x=3 dan x = -2
2) 2x^ - 5x - 12 - x^ + 16
x^ - 5x + 4
(x - 4) (x - 1)
x=4 dan x = 1
3) x^ - 25 + x^ + 2X - 35 = 0
2x^ + 2X - 60 = 0
(x + 6) ( 2x - 10)
x=-6 dan x= 10/2=5