这几道分解因式杂做阿,1.1-2^2+3^2-4^2+5^2-6^2+……+99^2-100^2=?2.(x^2+3x-2)(x^2+3x+4)-163.(x-y)^2 -5(x-y)-144.证明:(1) (2a+1)^2 -1能被8整除(2) a^3-a能被6整除
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![这几道分解因式杂做阿,1.1-2^2+3^2-4^2+5^2-6^2+……+99^2-100^2=?2.(x^2+3x-2)(x^2+3x+4)-163.(x-y)^2 -5(x-y)-144.证明:(1) (2a+1)^2 -1能被8整除(2) a^3-a能被6整除](/uploads/image/z/11033118-54-8.jpg?t=%E8%BF%99%E5%87%A0%E9%81%93%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%E6%9D%82%E5%81%9A%E9%98%BF%2C1.1-2%5E2%2B3%5E2-4%5E2%2B5%5E2-6%5E2%2B%E2%80%A6%E2%80%A6%2B99%5E2-100%5E2%3D%3F2.%28x%5E2%2B3x-2%29%28x%5E2%2B3x%2B4%29-163.%28x-y%29%5E2+-5%28x-y%29-144.%E8%AF%81%E6%98%8E%3A%281%29+%282a%2B1%29%5E2+-1%E8%83%BD%E8%A2%AB8%E6%95%B4%E9%99%A4%282%29+a%5E3-a%E8%83%BD%E8%A2%AB6%E6%95%B4%E9%99%A4)
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