因式分解12y(x-y)²-8(x-y)³

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因式分解12y(x-y)²-8(x-y)³
因式分解12y(x-y)²-8(x-y)³

因式分解12y(x-y)²-8(x-y)³
12y(x-y)²-8(x-y)³
=4（x-y)²(3y-1)

12y(x-y)²-8(x-y)³
=(x-y)²(12y-8x+8y)
=(x-y)²(20y-8x)
=4(x-y)²(5y-2x)