(y-x)²-10x+10y+25因式分解,

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(y-x)²-10x+10y+25因式分解,
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(y-x)²-10x+10y+25因式分解,
(y-x)²-10x+10y+25因式分解,

(y-x)²-10x+10y+25因式分解,
(y-x)²=(x-y)²
原式
=(x-y)²-10(x-y)+25
=(x-y-5)^2

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