Question

if x=3+✓8 thenfind the value (x^2+1/x^2)​

Answer 1

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Answer 2

x =3+√8

x =(3+√8)(3-√8)/3-√8

x=(9-8)/(3-√8)

x=1/(3-√8)

we can write 1/x =(3-√8)

put the value and find out x^2+(1/x^2)=x^2+1/x)^2

so,

x^2+1/x^2=(3+√8)^2+(3-√8)^2

=9+6√8+8+9-6√8+8

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