因式分解25x²y(m-2n)²-10xy²(2n-m)²

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因式分解25x²y(m-2n)²-10xy²(2n-m)²

25x²y(m-2n)²-10xy²(2n-m)²
=25x²y(m-2n)²-10xy²(m-2n)²
=5xy(m-2n)²(5x-2y)