初中的几道数学题(1)已知4x的2m+n-4-5y的3m+4n-1次方=8是关于x、y的二元一次方程,则m+n=(2) 简便计算:7.29²-2.71²=(3)(y-2)(y+2)-2(y+3)(y-1)= (4)(x+2y)²-(x+y)(x-y)= (5)因式分解:2m(a-b
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 01:15:08
![初中的几道数学题(1)已知4x的2m+n-4-5y的3m+4n-1次方=8是关于x、y的二元一次方程,则m+n=(2) 简便计算:7.29²-2.71²=(3)(y-2)(y+2)-2(y+3)(y-1)= (4)(x+2y)²-(x+y)(x-y)= (5)因式分解:2m(a-b](/uploads/image/z/1991083-67-3.jpg?t=%E5%88%9D%E4%B8%AD%E7%9A%84%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%881%EF%BC%89%E5%B7%B2%E7%9F%A54x%E7%9A%842m%2Bn-4-5y%E7%9A%843m%2B4n-1%E6%AC%A1%E6%96%B9%3D8%E6%98%AF%E5%85%B3%E4%BA%8Ex%E3%80%81y%E7%9A%84%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%2C%E5%88%99m%2Bn%3D%EF%BC%882%EF%BC%89+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A7.29%26%23178%3B-2.71%26%23178%3B%3D%EF%BC%883%EF%BC%89%EF%BC%88y-2%29%28y%2B2%29-2%28y%2B3%29%28y-1%29%3D++%284%29%28x%2B2y%29%26%23178%3B-%EF%BC%88x%2By%29%28x-y%29%3D++%285%29%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A2m%EF%BC%88a-b)
xTn@HHȃ;Mq#J>Q{iҦ⡶iiKUHEP9tP[9 Q3wsǹ,mm;6;ꊻvFR{O RKXil(%ovܧ6;Jeڨ;
Gx۴ KnUg~oVF!wnP3ٻ($Y2AUdR$S&jİӈ>Pm-^Aߛ|SDůOC\+0YV{*]ؤS;v?d-uHn