因式分解ab+ac-b^2-2bc-c^2 2.因式分解2(a^2-3bc) +a(4b-3c) 3.已知x+2y=1/3,x-5y=-1/2,求6x^2-18xy-60y^2的值4.已知5x^2-4xy+y^2-2x+1=0,求(x-y)^2010的值5.如果一个三角形的边长为a,b,c都为整数,且a+bc+b+ca=8,求三角形的
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![因式分解ab+ac-b^2-2bc-c^2 2.因式分解2(a^2-3bc) +a(4b-3c) 3.已知x+2y=1/3,x-5y=-1/2,求6x^2-18xy-60y^2的值4.已知5x^2-4xy+y^2-2x+1=0,求(x-y)^2010的值5.如果一个三角形的边长为a,b,c都为整数,且a+bc+b+ca=8,求三角形的](/uploads/image/z/5430808-64-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3ab%2Bac-b%5E2-2bc-c%5E2+2.%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A32%28a%5E2-3bc%29+%2Ba%284b-3c%EF%BC%89+3.%E5%B7%B2%E7%9F%A5x%2B2y%3D1%2F3%2Cx-5y%3D-1%2F2%2C%E6%B1%826x%5E2-18xy-60y%5E2%E7%9A%84%E5%80%BC4.%E5%B7%B2%E7%9F%A55x%5E2-4xy%2By%5E2-2x%2B1%3D0%2C%E6%B1%82%28x-y%29%5E2010%E7%9A%84%E5%80%BC5.%E5%A6%82%E6%9E%9C%E4%B8%80%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E8%BE%B9%E9%95%BF%E4%B8%BAa%2Cb%2Cc%E9%83%BD%E4%B8%BA%E6%95%B4%E6%95%B0%2C%E4%B8%94a%2Bbc%2Bb%2Bca%3D8%2C%E6%B1%82%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84)
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