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111412If x-4= 5, find the values of x' +and x* +х2X хX х​

Answer»

Answer:

If x + 1/x = 5, FIND the value of x2 + 1/x2

Given :

( x + 1 /x ) = 5

We need to find x2 + 1 / x2

( x + 1 / x )2 = 25

= x2 + 1 / x2 + 2 (x)(1/x) = 25

= x2 + 1/x2 + 2 = 25

= x2 + 1 / x2 = 25 – 2

= x2 + 1 / x2=23

Hence x2 + 1 / x2 = 23


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