x²-4x+4/x²-4+x-2/x²+2x+2
展开全部
解
原式=[(x-2)²/(x-2)(x+2)] +[(x-2)/x(x+2)]+2
=[(x-2)/(x+2)]+[(x-2)/x(x+2)]+[2x(x+2)/x(x+2)]
=[x(x-2)+(x-2)+2x(x+2)]/[x(x+2)]
=(3x²+3x-2)/[x(x+2)]
=(3x²+3x-2)/(x²+2x)
原式=[(x-2)²/(x-2)(x+2)] +[(x-2)/x(x+2)]+2
=[(x-2)/(x+2)]+[(x-2)/x(x+2)]+[2x(x+2)/x(x+2)]
=[x(x-2)+(x-2)+2x(x+2)]/[x(x+2)]
=(3x²+3x-2)/[x(x+2)]
=(3x²+3x-2)/(x²+2x)
追答
包质量,不懂可再问
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
(x^2-4x+4)/(x^2-4) +(x-2)/(x^2+2x) +2
=(x-2)^2/[(x-2)(x+2)] +(x-2)/[x(x+2)] +2
=(x-2)/(x+2) +(x-2)/[x(x+2)] +2
=[ x(x-2) + (x-2) + 2x(x+2) ]/[x(x+2)]
=( x^2-2x + x-2 + 2x^2+4x )/[x(x+2)]
=( 3x^2+3x -2 )/[x(x+2)]
=(x-2)^2/[(x-2)(x+2)] +(x-2)/[x(x+2)] +2
=(x-2)/(x+2) +(x-2)/[x(x+2)] +2
=[ x(x-2) + (x-2) + 2x(x+2) ]/[x(x+2)]
=( x^2-2x + x-2 + 2x^2+4x )/[x(x+2)]
=( 3x^2+3x -2 )/[x(x+2)]
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
广告 您可能关注的内容 |