作业帮[（x+2）/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/06 01:48:48
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[（x+2）/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
[（x+2）/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
[（x+2）/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
[（x+2）/（x*x-2x）-（x-2）/（x*x-4x+4）]/[(x-4)/x]=[（x+2)/x(x-2)-(x-2)/(x-2)²]/[(x-4)/x]=[(x²-4-x²+2x)/x(x-2)²]/[(x-4)/x]=2(x-2)/x(x-2)²÷[(x-4)/x]=2/[(x-2)(x-4)]