解方程:1:x+2y+3 x^2-2y+3x-2=0 2:x^2+y^2=4 2xy=-21 求详细过程,谢啦!解方程:1:x+2y+3 x^2-2y+3x-2=0 2:x^2+y^2=4 2xy=-21 求详细过程,谢啦!除了第一题外=号大成+
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![解方程:1:x+2y+3 x^2-2y+3x-2=0 2:x^2+y^2=4 2xy=-21 求详细过程,谢啦!解方程:1:x+2y+3 x^2-2y+3x-2=0 2:x^2+y^2=4 2xy=-21 求详细过程,谢啦!除了第一题外=号大成+](/uploads/image/z/2735050-58-0.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A1%EF%BC%9Ax%2B2y%2B3+x%5E2-2y%2B3x-2%3D0+2%EF%BC%9Ax%5E2%2By%5E2%3D4+2xy%3D-21+%E6%B1%82%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B%2C%E8%B0%A2%E5%95%A6%21%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A1%EF%BC%9Ax%2B2y%2B3++++++++++++++++++x%5E2-2y%2B3x-2%3D0++++++++++++++2%EF%BC%9Ax%5E2%2By%5E2%3D4+++++++++++++++++2xy%3D-21++++++++++++%E6%B1%82%E8%AF%A6%E7%BB%86%E8%BF%87%E7%A8%8B%2C%E8%B0%A2%E5%95%A6%21%E9%99%A4%E4%BA%86%E7%AC%AC%E4%B8%80%E9%A2%98%E5%A4%96%3D%E5%8F%B7%E5%A4%A7%E6%88%90%2B)
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