1.把下列因式分解x(a-b-c)+y(b+c-a)2.若多次式x^3+px^2+q+r分解因式为(x-1)(x-2)(x+3)试求p,q,r的值.3.试探究3^2007-4*3^2006+10*3^2005能否被7整除,说明理由.
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![1.把下列因式分解x(a-b-c)+y(b+c-a)2.若多次式x^3+px^2+q+r分解因式为(x-1)(x-2)(x+3)试求p,q,r的值.3.试探究3^2007-4*3^2006+10*3^2005能否被7整除,说明理由.](/uploads/image/z/15196741-61-1.jpg?t=1.%E6%8A%8A%E4%B8%8B%E5%88%97%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3x%28a-b-c%29%2By%28b%2Bc-a%292.%E8%8B%A5%E5%A4%9A%E6%AC%A1%E5%BC%8Fx%5E3%2Bpx%5E2%2Bq%2Br%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%E4%B8%BA%28x-1%29%28x-2%29%28x%2B3%29%E8%AF%95%E6%B1%82p%2Cq%2Cr%E7%9A%84%E5%80%BC%EF%BC%8E3.%E8%AF%95%E6%8E%A2%E7%A9%B63%5E2007-4%2A3%5E2006%2B10%2A3%5E2005%E8%83%BD%E5%90%A6%E8%A2%AB7%E6%95%B4%E9%99%A4%2C%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%EF%BC%8E)
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