1)下列等式中从左到右的变形是因式分解的是____A.(x+2)(x-2)=x²-4 B.x²-4+3x=(x+2)(x-2)+3xC.x²-3x-4=(x-4)(x+1) D.x²+2x-3=(x+1)²-42)分解多项式a²-b²-c²+2bc时,分组正确的是____A.(a
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![1)下列等式中从左到右的变形是因式分解的是____A.(x+2)(x-2)=x²-4 B.x²-4+3x=(x+2)(x-2)+3xC.x²-3x-4=(x-4)(x+1) D.x²+2x-3=(x+1)²-42)分解多项式a²-b²-c²+2bc时,分组正确的是____A.(a](/uploads/image/z/5627976-24-6.jpg?t=1%EF%BC%89%E4%B8%8B%E5%88%97%E7%AD%89%E5%BC%8F%E4%B8%AD%E4%BB%8E%E5%B7%A6%E5%88%B0%E5%8F%B3%E7%9A%84%E5%8F%98%E5%BD%A2%E6%98%AF%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E7%9A%84%E6%98%AF____A.%EF%BC%88x%2B2%EF%BC%89%28x-2%29%3Dx%26%23178%3B-4+B.x%26%23178%3B-4%2B3x%3D%28x%2B2%29%28x-2%29%2B3xC.x%26%23178%3B-3x-4%3D%28x-4%29%28x%2B1%29+D.x%26%23178%3B%2B2x-3%3D%28x%2B1%29%26%23178%3B-42%29%E5%88%86%E8%A7%A3%E5%A4%9A%E9%A1%B9%E5%BC%8Fa%26%23178%3B-b%26%23178%3B-c%26%23178%3B%2B2bc%E6%97%B6%2C%E5%88%86%E7%BB%84%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AF____A.%28a%26%23)
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