x+1/x=3,find x^2+1/x^2
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Using the formula:-(a+b)^2
=>(x+1/x)^2=x^2+2.x.1/x+1/x^2
=>(3)^2=x^2+1/x^2+2
=>9=x^2+1/x^2+2
=>x^2+1/x^2=9-2=7 [ANS]
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