作业帮x³+x²y/x²y-y³-x﹙x-y﹚/xy+x²-2xy/x²-y2
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/25 04:07:01
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x³+x²y/x²y-y³-x﹙x-y﹚/xy+x²-2xy/x²-y2
x³+x²y/x²y-y³-x﹙x-y﹚/xy+x²-2xy/x²-y2
x³+x²y/x²y-y³-x﹙x-y﹚/xy+x²-2xy/x²-y2
原式=x²(x+y)/y(x+y)(x-y)-x(x-y)/x(x+y)-2xy/(x+y)(x-y)
=(x³+x²y-x³+2x²y-xy²-2xy²))/y(x+y)(x-y)
=(3x²y-3xy²))/y(x+y)(x-y)
=3xy(x-y)/y(x+y)(x-y)
=3x/(x+y)