x=1-root2......(x+1/x)^3=?
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Step-by-step explanation:
x=1-√2
[(1-√2) +(1/1-√2)]^3
[{(1+2-2√2) +1}/1-√2]^3
[(4-2√2)/(1-√2)]^3
{2√2 [√2-1]/1-√2}^3
(-2√2)^3
-16√2
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