已知x^1/2+x^-1/2=3则x+1/x=

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已知x^1/2+x^-1/2=3则x+1/x=已知x^1/2+x^-1/2=3则x+1/x=已知x^1/2+x^-1/2=3则x+1/x=x^1/2+x^-1/2=3平方x+1/x=7

已知x^1/2+x^-1/2=3则x+1/x=
已知x^1/2+x^-1/2=3则x+1/x=

已知x^1/2+x^-1/2=3则x+1/x=
x^1/2+x^-1/2=3 平方
x+1/x=7