If =(√−1/√)^2 then show that ^2 − − 2 = −2
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Answer:
x=1+
2
now
(x−(
x
1
)) 3 =
(1+
2
−(
1+
2
1
))
3
=
[1+
2
−(
2
+1
1
)×(
2
−1
2
−1
)]
3
=
[1+
2
−(
2
−1)]
3
= (1+
2
−
2
+ 1)
3
=
2 3
8
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