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If x+1/x= √5 , then find x²+1/x² Pls help fast

Answer» X+1/x=√5
squaring both SIDES
(x+1/x)^2=(√5)^2
x^2+2*x*1/x+1/x^2=5
x^2+2+1/x^2=5
x^2+1/x^2=5-2
x^2+1/x^2=3..


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