若x^2-4x+1=0,求:x^2+1/x^2的值

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若x^2-4x+1=0,求:x^2+1/x^2的值若x^2-4x+1=0,求:x^2+1/x^2的值若x^2-4x+1=0,求:x^2+1/x^2的值x²-4x+1=0(两边同除以x)x+1

若x^2-4x+1=0,求:x^2+1/x^2的值
若x^2-4x+1=0,求:x^2+1/x^2的值

若x^2-4x+1=0,求:x^2+1/x^2的值

x²-4x+1=0 (两边同除以x)
x+1/x-4=0
x+1/x=4 (两边平方)
x²+2x*(1/x)+1/x²=16
x²+2+1/x²=16
x²+1/x²=14