Question

If x=1-root2 the value of (x-x^-1)^3

Answer 1

Answer:

If,

X=-1 root 2

X= 1

Expression,

(x-x^-1)^3

we put X=1 ,

(1-1^-1)^3

(1+1)^3

(2)^3

2×2×2

8

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