已知方程组2x+y+6=0 X-Y+3=0的解集是{(a,b)}.集合{a+b}是方程x²+(a+b)x+c=0的解集的一个真子集求:1:a、b、c的值2:求方程X²+(a+b)x+c=0的解集的所有真子集
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![已知方程组2x+y+6=0 X-Y+3=0的解集是{(a,b)}.集合{a+b}是方程x²+(a+b)x+c=0的解集的一个真子集求:1:a、b、c的值2:求方程X²+(a+b)x+c=0的解集的所有真子集](/uploads/image/z/3006905-41-5.jpg?t=%E5%B7%B2%E7%9F%A5%E6%96%B9%E7%A8%8B%E7%BB%842x%2By%2B6%3D0+X-Y%2B3%3D0%E7%9A%84%E8%A7%A3%E9%9B%86%E6%98%AF%7B%28a%2Cb%29%7D.%E9%9B%86%E5%90%88%7Ba%2Bb%7D%E6%98%AF%E6%96%B9%E7%A8%8Bx%26%23178%3B%2B%EF%BC%88a%2Bb%EF%BC%89x%2Bc%3D0%E7%9A%84%E8%A7%A3%E9%9B%86%E7%9A%84%E4%B8%80%E4%B8%AA%E7%9C%9F%E5%AD%90%E9%9B%86%E6%B1%82%EF%BC%9A1%EF%BC%9Aa%E3%80%81b%E3%80%81c%E7%9A%84%E5%80%BC2%EF%BC%9A%E6%B1%82%E6%96%B9%E7%A8%8BX%26%23178%3B%2B%EF%BC%88a%2Bb%EF%BC%89x%2Bc%3D0%E7%9A%84%E8%A7%A3%E9%9B%86%E7%9A%84%E6%89%80%E6%9C%89%E7%9C%9F%E5%AD%90%E9%9B%86)
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