Question

if x+1/x=5find value of x^2+1/x^2​

Answer 1

your ans

x+1/x=5

=>x^2+1=5x------>1)

x^2+1/x^2

=>5x/x^2

=>5/x-------2

1)----<x^2-5x+1

x=5+_√[(-5)^2-4×1×1]/2×1

=5+_√25-4/2

=5+_√21/2

x=(5+√21)/2,(5-√21)/2

------2< =5/(5+√21)/2,5/(5-√21)/2

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