Question

if (x+1/x)^2=3 then find the value of x^3+1/x^3​

Answer 1

Answer :

36

Step-by-step explanation :

x - 1 / x = 3

On cubing both sides ;

( x - 1 / x ) = ( 3 )³

Using Identity :

( a - b )³ = a³ - b³ - 3 ab ( a - b )

⇒ x³ - 1 / x³ - 3 ( x - 1 / x ) = 27

⇒ x³ - 1 / x³ - 3 ( 3 ) = 27

⇒ x³ - 1 / x³ - 9 = 27

⇒ x³ - 1 / x³ = 27 + 9

⇒ x³ - 1 / x³ = 36

Hence, the answer is 36.

Step-by-step explanation:

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Answer 2

Answer:

36

Step-by-step explanation:

it is very is too find out

firstly you have to sqaure both side after sqauring you will find your solution

hope you doesn't understand