Question

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

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x=√5+2

$\frac{1}{x}$=√5-2

$(x + \frac{1}{x} ) = 2 \sqrt{5}$

$({x + \frac{1}{x} )}^{2} = 18$

Answer 2

Answer:

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