3-x/2x-4除以{（x+2)-(5/x-2)}
答案:3 悬赏:30 手机版
解决时间 2021-12-22 21:44
- 提问者网友：做自己de王妃
- 2021-12-22 09:35
3-x/2x-4除以{（x+2)-(5/x-2)}
最佳答案
- 五星知识达人网友：慢性怪人
- 2022-01-06 00:51
=(3-x/(2(x-2)))÷((x+2)*(x-2)/(x-2)-5/(x-2))
=(3-x/(2(x-2)))÷((x+2)*(x-2)-5/x-2))
=(3-x/(2(x-2)))*((x-2)/(x+2)*(x-2)-5)
=(3-x)/2*(1/x*x-9)
=-(x-3)/2*(1/(x+3)*(x-3))
=-1/2(x+3)
=(3-x/(2(x-2)))÷((x+2)*(x-2)-5/x-2))
=(3-x/(2(x-2)))*((x-2)/(x+2)*(x-2)-5)
=(3-x)/2*(1/x*x-9)
=-(x-3)/2*(1/(x+3)*(x-3))
=-1/2(x+3)
全部回答
- 1楼网友：风格不统一
- 2022-01-06 02:49
[(3-x)/(2x-4)]/[(x+2)-(5/x-2)]么
- 2楼网友：低音帝王
- 2022-01-06 01:47
原式=[(3-x)/2(x-2)]÷{[(x-2)(x+2)-5]/(x-2)}
=[(3-x)/2(x-2)]÷[(x²-9)/(x-2)]
=[(3-x)/2(x-2)]÷[(x+3)(x-3)/(x-2)]
=-(x-3)(x-2)/[2(x-2)(x+3)(x-3)]
=-1/[2(x+3)]
=-1/(2x+6)
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