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

题目详情

▼优质解答

答案和解析

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)

看了 x-y+(y2/x+y)+(...的网友还看了以下：