x-1/x²+2x+1与2/x²-12mn/9-4m²与2m-3/2m+3x-1/x²+3x+2与5+x/x²-x-6与x-7/x²-2x-3a-1/a²-3-2a与a/a²-5a+6与2/9-2a

分类: 作业答案 • 2022-01-02 16:12:47

问题描述：

x-1/x²+2x+1与2/x²-1
2mn/9-4m²与2m-3/2m+3
x-1/x²+3x+2与5+x/x²-x-6与x-7/x²-2x-3
a-1/a²-3-2a与a/a²-5a+6与2/9-2a

答