解方程:1/(x^2+2x+10)+1/(x^2+11x+10)+1/(x^2-13x+10)=0

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解方程:1/(x^2+2x+10)+1/(x^2+11x+10)+1/(x^2-13x+10)=0
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解方程:1/(x^2+2x+10)+1/(x^2+11x+10)+1/(x^2-13x+10)=0
解方程:1/(x^2+2x+10)+1/(x^2+11x+10)+1/(x^2-13x+10)=0

解方程:1/(x^2+2x+10)+1/(x^2+11x+10)+1/(x^2-13x+10)=0
令 x^2+10=a,带入原方程 解关于a的方程
知道做了吗?!

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