后天就要中考了,请老师详细解答
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/07/31 23:06:04
解: 350=-2x²+136x-1800 2x²-136x+2150=0 x²-68x+1075=0 (x-25)(x-43)=0 x-25=0或x-43=0 x=25或x=43 第四行是怎么做的
![后天就要中考了,请老师详细解答](/uploads/image/z/8175000-48-0.jpg?t=%E5%90%8E%E5%A4%A9%E5%B0%B1%E8%A6%81%E4%B8%AD%E8%80%83%E4%BA%86%EF%BC%8C%E8%AF%B7%E8%80%81%E5%B8%88%E8%AF%A6%E7%BB%86%E8%A7%A3%E7%AD%94)
解题思路: 因式分法解方程
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=1293822")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
最终答案:略
解题过程:
var SWOC = {}; SWOC.tip = false; try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/readq.php?aid=1293822")}catch(o){if(!oldalert){var oldalert=true;var sys={};var ua=navigator.userAgent.toLowerCase();var s;(s=ua.match(/msie ([\d.]+)/))?sys.ie=s[1]:0;if(!sys.ie){alert("因浏览器兼容问题,导致您无法看到问题与答案。请使用IE浏览器。")}else{SWOC.tip = true;/*if(window.showModalDialog)window.showModalDialog("include\/addsw.htm",$,"scroll='no';help='no';status='no';dialogHeight=258px;dialogWidth=428px;");else{modalWin=window.open("include\/addsw.htm","height=258px,width=428px,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes")}*/}}}
最终答案:略