因式分解:(1)(x-y)²-2(x-y)+1(2)(x+1)²-4x(x+1)+4x²

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因式分解:(1)(x-y)²-2(x-y)+1(2)(x+1)²-4x(x+1)+4x²
因式分解:(1)(x-y)²-2(x-y)+1(2)(x+1)²-4x(x+1)+4x²

因式分解:(1)(x-y)²-2(x-y)+1(2)(x+1)²-4x(x+1)+4x²
(1)(x-y)²-2(x-y)+1
=(x-y-1﹚²
(2)(x+1)²-4x(x+1)+4x²
=﹙x+1-2x﹚²
=﹙1-x﹚²