分解因式x²-2xy+y²-2x+2y+1
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分解因式x²-2xy+y²-2x+2y+1
分解因式x²-2xy+y²-2x+2y+1
分解因式x²-2xy+y²-2x+2y+1
x²-2xy+y²-2x+2y+1
=(x-y)²-2(x-y)+1
=(x-y-1)²
(x-y-1)^2
x²-2xy+y²-2x+2y+1
=(x-y)²-2(x-y)+1
=(x-y-1)²
x²-2xy+y²-2x+2y+1
=(x-y)^2-2(x-y)+1
=(x-y-1)^2
(x-y)平方-2(x-y)+1
=(x-y-1)平方
x²-2xy+y²-2x+2y+1
=(x-y)² -2(x-y)+1
=(x-y-1)²
x²-2xy+y²-2x+2y+1=(x-y)²-2(x-y)+1=(x-y-1)²