代数 (9 18:58:47)1. 已知关于x的方程x2-(5-[m])x+m-3=0的两个实根互为相反数,则实数m的值为__________. 2. a为何值时,关于x,y的方程租组(x+2y=6,x-y=9-3a)有正整
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![代数 (9 18:58:47)1. 已知关于x的方程x2-(5-[m])x+m-3=0的两个实根互为相反数,则实数m的值为__________. 2. a为何值时,关于x,y的方程租组(x+2y=6,x-y=9-3a)有正整](/uploads/image/z/62844-60-4.jpg?t=%E4%BB%A3%E6%95%B0+%289+18%3A58%3A47%291.%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B+%E5%B7%B2%E7%9F%A5%E5%85%B3%E4%BA%8Ex%E7%9A%84%E6%96%B9%E7%A8%8Bx2-%285-%5Bm%5D%29x%2Bm-3%3D0%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%AE%9E%E6%A0%B9%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E5%88%99%E5%AE%9E%E6%95%B0m%E7%9A%84%E5%80%BC%E4%B8%BA__________.%26%23160%3B%26%23160%3B+2.%26%23160%3B+a%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C%E5%85%B3%E4%BA%8Ex%2Cy%E7%9A%84%E6%96%B9%E7%A8%8B%E7%A7%9F%E7%BB%84%EF%BC%88x%2B2y%3D6%2Cx-y%3D9-3a%EF%BC%89%E6%9C%89%E6%AD%A3%E6%95%B4)
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