Question

(x-1)➗(x＋1分之2－1)如何解 化简

Answer 1

(x-1)÷[2/(x＋1)－1]
=(x-1)÷➗[(2-x-1)/(x＋1)]
=(x-1)÷➗[(1-x)/(x＋1)]
=(x-1)*➗[(x＋1)/(1-x)]
=-x-1
中间符号没显示出来,应该是除号吧.
如果不是请告知.