Question

If x equals to 1- root 2,find the value of (x-1/x)³

Answer 1

x - 1/x 

= 2 - √3 - ( 2 + √3 )

= 2 - √3 - 2 - √3

= - 2√3 ---( 3 )

Therefore ,

( x - 1/x )³ = ( - 2√3 )³

= - 24√3

I hope this helps you.