if x= 5-√3÷5+√3 and y=5+√3÷5-√3 then x cube + y cube is?

Question

Mithlesh Trivedi · Answer

11788/1331

SpaceZ SpaceZ · Answer

First Rationalise x and y then use 
(x+y) cube = x cube +y cube +3xy(x+y) to get answer

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