if x= 1- root2, find the value of x -1upon x rays to the power3
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x=1-√2
1/x=1/1-√2
multiple 1+√2 upper & bottom
now,
=1/1-√2 * 1+√2/1+√2
=1+√2/12- √22
=1+√2/-1
=√2-1
X+I/X=1-√2+√2-1
=0
(X+1/X)3 =0 Ans
1/x=1/1-√2
multiple 1+√2 upper & bottom
now,
=1/1-√2 * 1+√2/1+√2
=1+√2/12- √22
=1+√2/-1
=√2-1
X+I/X=1-√2+√2-1
=0
(X+1/X)3 =0 Ans
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