1.化简：x²-4y²/x²+y²+2xy÷2y+x/x²+xy.2.化简a^4-a²b²/(a-b)²÷a（a+b）/b²,b²/a的结果是__________.3.已知x+1/x=3,则x²+1/x²=__________.4.汽车从甲地开往乙地,每小时行驶V

来源：学生作业帮助网 编辑：作业帮 时间：2024/08/06 09:23:22
xSn@$ȏaC Ɇ%(rvn󐃚MH GɢR|*v\ s=3N2sy8m8#mjO81n0L3jQ DN0?&sJ<3yeFٮ*({촋 阤9~}|م F`Ao ȓ]eͩ_9͞(f؀A]SӤr?_'60T O͆ў !]{1&TT|;yҜez4IJX_tG=(M=SsԭmP*pV#{ o'r@U۪ }[QuYQic(QA1L^fvT,?ڱb[ uhk[uY06)IF2) fW_nMܮ:79I1Kљ&Q0߿KMɗi%s<$³qA&h^,0RNp0Aj\D3A))imPD/3 q?p