x-1/x=3,求x^2+1/x^2的值

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x-1/x=3,求x^2+1/x^2的值x-1/x=3,求x^2+1/x^2的值x-1/x=3,求x^2+1/x^2的值因为x-1/x=3,所以(x-1/x)^2=9,(x-1/x)^2=x^2-2+

x-1/x=3,求x^2+1/x^2的值
x-1/x=3,求x^2+1/x^2的值

x-1/x=3,求x^2+1/x^2的值
因为x-1/x=3,所以(x-1/x)^2=9,(x-1/x)^2=x^2-2+1/x^2=9,所以x^2+1/x^2=11