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