Question

if x=√5+2,then find the value of x²+1/x²​ .
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Answer 1

Ans:- Given

x = √5+2

To find x²+1/x²

Solution:-

=> 1/x = 1/(√5+2)

=> 1/x = 1/(√5+2)×(√5-2)/(√5-2)

=> 1/x = (√5-2)/5-4

=> 1/x = √5-2

Now,

=> (x+1/x)² = x²+1/x²+2×x×1/x

=> (√5+2+√5-2)² = x²+1/x²+2

=> 5 = x²+1/x²+2

=> x²+1/x² = 3

here is your answer

hope it will help you

Answer 2

Answer:

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Step-by-step explanation:

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