Question

If X = 3+2√2, then find the value of {x-1/X}^3. please tell​

Answer 1

Answer:

(3+2√2-1) /( 3+2√2)=(2+2√2)/( 3+2√2)

=(2 (1+ √2)×(3-2 √2)) /(1) (rationalisation )

= 2 (3+ √2-4)

= 2( √2-1) =

( -2(1- √2))^3 = -8(1-2 √2-3 ( √2)(1- √2)) ( (a-b)^3 formula )

=-56+40 √2