㎡-2mn+n²-2m+2n+1 因式分解
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㎡-2mn+n²-2m+2n+1因式分解㎡-2mn+n²-2m+2n+1因式分解㎡-2mn+n²-2m+2n+1因式分解㎡-2mn+n²-2m+2n+1＝(㎡-
㎡-2mn+n²-2m+2n+1 因式分解
㎡-2mn+n²-2m+2n+1 因式分解
㎡-2mn+n²-2m+2n+1 因式分解
㎡-2mn+n²-2m+2n+1
＝(㎡-2mn+n²)-(2m-2n)+1
=(m-n)²-2(m-n)+1
=[(m-n)-1]²
=(m-n-1)²
能在纸上再写一遍不