Question

If x=3+2 root 2 then find (x-1/x)^3​

Answer 1

Answer:

» x = 3 + 2√2

Therefore, 1/x = 3 - 2√2

» (x - 1/x)³

= (3 + 2√2 - 3 + 2√2)³

= (4√2)³

= 128√2