x/(x-1) -1=3/(x-1)(x+2) 斜线代表是分数,请写清楚过程坐下来.
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x/(x-1) -1=3/(x-1)(x+2) 斜线代表是分数,请写清楚过程坐下来.
x/(x-1) -1=3/(x-1)(x+2)
斜线代表是分数,请写清楚过程坐下来.
x/(x-1) -1=3/(x-1)(x+2) 斜线代表是分数,请写清楚过程坐下来.
解由x/(x-1) -1=3/(x-1)(x+2)
知两边乘以(x-1)(x+2)
得x(x+2)-(x-1)(x+2) =3
即x^2+2x-(x^2+x-2)=3
即2x^2+x-1=0
即(2x-1)(x+1)=0
解x=1/2或x=-1
检验x=1/2或x=-1是原方程的根.
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