[x-5+16/(x+3)]/[(x-1)/(x*2-9)]
答案:2 悬赏:30
解决时间 2021-04-27 20:31
- 提问者网友：王者刀枪不入
- 2021-04-27 01:28
[x-5+16/(x+3)]/[(x-1)/(x*2-9)]
最佳答案
- 二级知识专家网友：狙击你的心
- 2021-04-27 02:16
[x-5+16/(x+3)]/[(x-1)/(x^2-9)]
=(x-3)[ (x+3)(x-5)+16]/(x-1)
=(x-3)(x^2-2x+1)/(x-1)
=(x-3)(x-1)
=x^2-4x+3
=(x-3)[ (x+3)(x-5)+16]/(x-1)
=(x-3)(x^2-2x+1)/(x-1)
=(x-3)(x-1)
=x^2-4x+3
全部回答
- 1楼网友：颜值超标
- 2021-04-27 03:08
解：1/(x-1)+1/(x+3)=（2x+2)/(x-1)（x+3)=4/(x+3)(x-3)
(x+1)/(x-1)=2/(x-3)
化简得：x^2-4x-1=0
所以x=2±根号5
我要举报
如以上问答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！
大家都在看
推荐资讯