化简(x-3分之1-x的平方-1分之x+1)乘以(x-3)的结果是

问题描述:

化简(x-3分之1-x的平方-1分之x+1)乘以(x-3)的结果是

=[1/(x-3)-(x+1)/(x+1)(x-1)]×(x-3)
=1-(x-3)/(x-1)
=2/(x-1)