x-y+(y2/x+y)+(x2/x-y)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/15 09:56:35
x-y+(y2/x+y)+(x2/x-y)x-y+(y2/x+y)+(x2/x-y)x-y+(y2/x+y)+(x2/x-y)x-y+(y²/x+y)+(x²/x-y)=x(x&#

x-y+(y2/x+y)+(x2/x-y)
x-y+(y2/x+y)+(x2/x-y)

x-y+(y2/x+y)+(x2/x-y)
x-y+(y²/x+y)+(x²/x-y)
=x(x²-y²)/(x²-y²)-y(x²-y²)/(x²-y²)+y²(x-y)/(x²-y²)+x²(x+y)/(x²-y²)
=(x³-xy²-x²y+y³+xy²-y³+x³+x²y)/(x²-y²)
=2x³/(x²-y²)