Giúp mình với!!!

B

bull1995

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X

xuanquynh75

Ta co:x^3-x=x(X-1)(X+1) chan voi moi x thuoc Z ma 2009 nen x^3- x -2009 khac 0 voi moi x thuoc Z
Vay P(X) khong co nghiem nguyen
 
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