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2x+1=x^2
Decide everythig by x
Thus 2+ 1/x = x
Thus x - 1/x = 2
Now then square both sides
Thus x^2 + 1/x^2 = 4 + 2 = 6
Now, x^3- 1/x^3 =(x- 1/x)(x^2 + 1/x^2 + 1)
= 2(6+1)= 14
Decide everythig by x
Thus 2+ 1/x = x
Thus x - 1/x = 2
Now then square both sides
Thus x^2 + 1/x^2 = 4 + 2 = 6
Now, x^3- 1/x^3 =(x- 1/x)(x^2 + 1/x^2 + 1)
= 2(6+1)= 14
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