SOLUTION: if x+1/x= 2 find the value of 8x^3+1/x^3

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Question 667681: if x+1/x= 2 find the value of 8x^3+1/x^3
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
if x+1/x= 2 find the value of 8x^3+1/x^3
..
x+1/x= 2
x^2+1=2x
x^2-2x+1=0
(x-1)^2=0
x-1=0
x=1
..
8x^3+1/x^3
=8+1
=9