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![九道关于平方差和完全平方的数学题~1.4x³-6x²-2x 2.a(x-3)³-b(y-x)² 3.9m²-n平方 4.25x²-十六分之一y² 5.(x²-y²)²-4x²y² 6.(xy)²-4xy+4 7.m的四次方-2m&](/uploads/image/z/1068084-36-4.jpg?t=%E4%B9%9D%E9%81%93%E5%85%B3%E4%BA%8E%E5%B9%B3%E6%96%B9%E5%B7%AE%E5%92%8C%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%7E1.4x%26%23179%3B-6x%26%23178%3B-2x+2.a%EF%BC%88x-3%EF%BC%89%26%23179%3B-b%EF%BC%88y-x%EF%BC%89%26%23178%3B+3.9m%26%23178%3B-n%E5%B9%B3%E6%96%B9+4.25x%26%23178%3B-%E5%8D%81%E5%85%AD%E5%88%86%E4%B9%8B%E4%B8%80y%26%23178%3B+5.%EF%BC%88x%26%23178%3B-y%26%23178%3B%EF%BC%89%26%23178%3B-4x%26%23178%3By%26%23178%3B+6.%EF%BC%88xy%EF%BC%89%26%23178%3B-4xy%2B4+7.m%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9-2m%26)
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