Question

if a=1-√2,then find the value of (a-1/a)3​

Answer 1

Answer=6

Explanation:1-√2-(1/1-√2)3

1-√2-(1+√2/1^2-√2^2)3

1-√2-(-1-√2)3

(1-√2+1+√2)3

2*3

6

Please see to it that I rationalised the denominator in step 2