Question

pls answer it it is hard​

Answer 1

Answer:

its not a full question here should given one more value please write full question

Answer 2

Answer: 756

Explanation:

Given :-

x² + 1/x² = 83 ---- eq. 1

We know the identity, (a - b)² = a² + b² - 2ab

→ x² + 1/x² - 2 = 81

→ ( x - 1/x )² = 81

→ ( x - 1/x ) = 9 ---- eq. 2

We also know that a³ - b³ = ( a - b ) ( a² + ab + b² )

→ x³ - 1/x³ = ( x - 1/x ) ( x² + 1 + 1/x² )

So from eq. 1 and eq. 2, we have :-

→ x³ - 1/x³ = (9) ( 83 + 1 )

⇒ x³ - 1/x³ = 756