化简式子(m-n)²-2m+2n+1 2.a²-b²-4+2ab
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![化简式子(m-n)²-2m+2n+1 2.a²-b²-4+2ab](/uploads/image/z/1811534-14-4.jpg?t=%E5%8C%96%E7%AE%80%E5%BC%8F%E5%AD%90%EF%BC%88m-n%29%26%23178%3B-2m%2B2n%2B1+2.a%26%23178%3B-b%26%23178%3B-4%2B2ab)
化简式子(m-n)²-2m+2n+1 2.a²-b²-4+2ab
化简式子(m-n)²-2m+2n+1 2.a²-b²-4+2ab
化简式子(m-n)²-2m+2n+1 2.a²-b²-4+2ab
(m-n)²-2m+2n+1
=(m-n)²-2(m-n)+1
=(m-n-1)²
2.a² + b²-4+2ab
=a²+2ab+b²-4
=(a+b)²-4
=(a+b+2)(a+b-2)