解方程:7/(x^2+x)+1/(x^2-x)=6/(x^2-1)
3个回答
两边同时乘以x^4-x^2
等于7(x^2-x)+(x^2+x)=6x^2
化简变形为x^2-3x=0
所以x=0或者x=3
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解方程:(1)x2+6x-7=0.(配方法解方程)(2)x2-x-1=0
解方程:[x+1/x+2 + x+6x+7 = x+2x+3+
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1.解方程(X+6)/(X+7)+(X+1)/(X+2)=(X+2)/(X+3)+(X+5)/(X+6)
解方程:(1)x2+6x=7