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The Brainliest Answer!
2014-10-25T17:00:52+05:30
X²+x+1=0
x+1+1/x=0   (dividing by x on both sides)
x+1/x=-1
⇒(x+1/x)³=-1
x³+1/x³+3(x+1/x)=-1
x³+1/x³-3=-1               (x+1/x = -1)(as mentioned above)
⇒x³+1/x³=2
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