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