x-1/x=3,则x²+1/x²的值是( )
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x-1/x=3,则x²+1/x²的值是( )
x-1/x=3,则x²+1/x²的值是( )
x-1/x=3,则x²+1/x²的值是( )
x-1/x=3
平分得 x^2-2+1/x^2=9
x^2+1/x^2=9+2=11
x-1/x=3,则x²+1/x²的值是( )
x-1/x=3,则x²+1/x²的值是( )
x-1/x=3,则x²+1/x²的值是( )
x-1/x=3
平分得 x^2-2+1/x^2=9
x^2+1/x^2=9+2=11