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x³ + x - 2 | x-1
-x³-x² x²+x+2
x²+x
- x²- x
2x-2
- 2x-2
0
x³+x-2=(x-1)(x²+x+2)
(x-1)(x²+x+2)=0
x-1=0 ∨ x²+x+2=0
x=1 D=1²-4*1*2=1-8=-7<0
Odp: 1