1.已知x^2+6xy+9y^2+|y-1|=0,则x+y=?2.4a^3-16a^2+16a=?3.-1/2x^2+xy-1/2y^24.(x^2+2x)^2+2(x^2+2x)+15.y^3-4y^2+4y6.一直a、b、c分别为三角形ABC的三条边,求证(a^2+b^2-c^2)^2-4a^2b^2小于0
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![1.已知x^2+6xy+9y^2+|y-1|=0,则x+y=?2.4a^3-16a^2+16a=?3.-1/2x^2+xy-1/2y^24.(x^2+2x)^2+2(x^2+2x)+15.y^3-4y^2+4y6.一直a、b、c分别为三角形ABC的三条边,求证(a^2+b^2-c^2)^2-4a^2b^2小于0](/uploads/image/z/5629866-42-6.jpg?t=1.%E5%B7%B2%E7%9F%A5x%5E2%2B6xy%2B9y%5E2%2B%7Cy-1%7C%3D0%2C%E5%88%99x%2By%3D%3F2.4a%5E3-16a%5E2%2B16a%3D%3F3.-1%2F2x%5E2%2Bxy-1%2F2y%5E24.%28x%5E2%2B2x%29%5E2%2B2%28x%5E2%2B2x%29%2B15.y%5E3-4y%5E2%2B4y6.%E4%B8%80%E7%9B%B4a%E3%80%81b%E3%80%81c%E5%88%86%E5%88%AB%E4%B8%BA%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E4%B8%89%E6%9D%A1%E8%BE%B9%2C%E6%B1%82%E8%AF%81%28a%5E2%2Bb%5E2-c%5E2%29%5E2-4a%5E2b%5E2%E5%B0%8F%E4%BA%8E0)
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1.已知x^2+6xy+9y^2+|y-1|=0,则x+y=?2.4a^3-16a^2+16a=?3.-1/2x^2+xy-1/2y^24.(x^2+2x)^2+2(x^2+2x)+15.y^3-4y^2+4y6.一直a、b、c分别为三角形ABC的三条边,求证(a^2+b^2-c^2)^2-4a^2b^2小于0
1.已知x^2+6xy+9y^2+|y-1|=0,则x+y=?
2.4a^3-16a^2+16a=?
3.-1/2x^2+xy-1/2y^2
4.(x^2+2x)^2+2(x^2+2x)+1
5.y^3-4y^2+4y
6.一直a、b、c分别为三角形ABC的三条边,求证(a^2+b^2-c^2)^2-4a^2b^2小于0
1.已知x^2+6xy+9y^2+|y-1|=0,则x+y=?2.4a^3-16a^2+16a=?3.-1/2x^2+xy-1/2y^24.(x^2+2x)^2+2(x^2+2x)+15.y^3-4y^2+4y6.一直a、b、c分别为三角形ABC的三条边,求证(a^2+b^2-c^2)^2-4a^2b^2小于0
我来
(1) 变形为:(X+3Y)^2+|y-1|=0
根据几个非负数和为0
(2) 变形为:4a(a-2)^2=0
把分给我哈。。。。。。。太难了我也不会
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