没有写的填空..那道题怎么算?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/26 14:54:39
没有写的填空..那道题怎么算?

没有写的填空..那道题怎么算?
没有写的填空..那道题怎么算?

 

没有写的填空..那道题怎么算?
分解公因式会吗?

(x+1)/(x²-1)-(x²-2x)/(x²-1)÷(x²-x-2)/(x²+2x+1)
=(x+1)/(x+1)(x-1)-x(x-2)/(x+1)(x-1)÷(x-2)(x+1)/(x+1)²
=1/(x-1)-x(x-2)/(x+1)(x-1)×(x+1)/(x-2)
=1/(x-1)-x/(x-1)
=(1-x)/(x-1)
=-(x-1)/(x-1)
=-1