Question

if x=1-2√2 find (x-1/x)³​

Answer 1

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