化简x-2分之2x-6除以（x-2分之5-x-2)
2个回答
展开全部
楼上的好像算错了。
应为：原式=[2(x-3)/(x-2)]÷[5/(x-2)-(x+2)]
=[2(x-3)/(x-2)]÷{[5-(x+2)(x-2)]/(x-2)}
=[2(x-3)/(x-2)]÷[(5-x²+4)/(x-2)]
=[2(x-3)/(x-2)]÷[-(x+3)(x-3)/(x-2)]
=-2(x-3)(x-2)/[(x-2)(x+3)(x-3)]
=-2/(x+3)
应为：原式=[2(x-3)/(x-2)]÷[5/(x-2)-(x+2)]
=[2(x-3)/(x-2)]÷{[5-(x+2)(x-2)]/(x-2)}
=[2(x-3)/(x-2)]÷[(5-x²+4)/(x-2)]
=[2(x-3)/(x-2)]÷[-(x+3)(x-3)/(x-2)]
=-2(x-3)(x-2)/[(x-2)(x+3)(x-3)]
=-2/(x+3)
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
展开全部
(2x-6)/(x-2)÷ [(5-x)/(x-2) -2]
=(2x-6)/(x-2)÷ [(5-x)/(x-2) -2(x-2)/(x-2)]
=(2x-6)/(x-2)÷ (5-x-2x+4)/(x-2)
=(2x-6)/(x-2)* (x-2)/ (9-3x)
=2(x-3)/3(3-x)
=-2/3
=(2x-6)/(x-2)÷ [(5-x)/(x-2) -2(x-2)/(x-2)]
=(2x-6)/(x-2)÷ (5-x-2x+4)/(x-2)
=(2x-6)/(x-2)* (x-2)/ (9-3x)
=2(x-3)/3(3-x)
=-2/3
本回答被网友采纳
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
