因式分解(y-x)^2+2x-2y
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因式分解(y-x)^2+2x-2y因式分解(y-x)^2+2x-2y因式分解(y-x)^2+2x-2y(y-x)^2+2x-2y=(x-y)^2+2(x-y)=(x-y)(x-y+2)(y-x)
因式分解(y-x)^2+2x-2y
因式分解(y-x)^2+2x-2y
因式分解(y-x)^2+2x-2y
(y-x)^2+2x-2y
=(x-y)^2+2(x-y)
=(x-y)(x-y+2)
(y-x)²+2x-2y
=(y-x)²+2(x-y)
=(y-x)²-2(y-x)(提负号要变号)
=(y-x)(y-x-2)(提公因式)
(y-x)^2+2x-2y
=(x-y)^2+2(x-y)
=(x-y)(x-y+2)
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