因式分解：m²-4n²+2m-4n x²-2xy+y²+ax-ay

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因式分解：m²-4n²+2m-4n x²-2xy+y²+ax-ay
因式分解：m²-4n²+2m-4n x²-2xy+y²+ax-ay

因式分解：m²-4n²+2m-4n x²-2xy+y²+ax-ay
m²-4n²+2m-4n
=(m+2n)(m-2n)+2(m-2n)
=(m+2n+2)(m-2n)
x²-2xy+y²+ax-ay
=(x-y)²+a(x-y)
=(x-y+a)(x-y)