求解这题化简求值怎么做?
展开全部
(2x-1)/(x-1) -x-1
= (2x-1-x^2+1)/(x-1)
=-x(x-2)/(x-1)
(x^2-4x+4)/(x-1)
=(x-2)^2/(x-1)
[(2x-1)/(x-1) -x-1] /[(x^2-4x+4)/(x-1)]
=-x(x-2) /(x-2)^2
=-x/(x-2)
=-(√2+2)/√2
=-(√2+2)√2/2
=-(1+√2)
= (2x-1-x^2+1)/(x-1)
=-x(x-2)/(x-1)
(x^2-4x+4)/(x-1)
=(x-2)^2/(x-1)
[(2x-1)/(x-1) -x-1] /[(x^2-4x+4)/(x-1)]
=-x(x-2) /(x-2)^2
=-x/(x-2)
=-(√2+2)/√2
=-(√2+2)√2/2
=-(1+√2)
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-1)/(x-1) -x-1
= (2x-1-x^2+1)/(x-1)
=-x(x-2)/(x-1)
(x^2-4x+4)/(x-1)
=(x-2)^2/(x-1)
[(2x-1)/(x-1) -x-1] /[(x^2-4x+4)/(x-1)]
=-x(x-2) /(x-2)^2
=-x/(x-2)
=-(√2+2)/√2
=-(√2+2)√2/2
=-(1+√2)
= (2x-1-x^2+1)/(x-1)
=-x(x-2)/(x-1)
(x^2-4x+4)/(x-1)
=(x-2)^2/(x-1)
[(2x-1)/(x-1) -x-1] /[(x^2-4x+4)/(x-1)]
=-x(x-2) /(x-2)^2
=-x/(x-2)
=-(√2+2)/√2
=-(√2+2)√2/2
=-(1+√2)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
他法人股他热发电
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