xy(x+y)²-4x³y³因式分解
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xy(x+y)²-4x³y³因式分解
xy(x+y)²-4x³y³因式分解
xy(x+y)²-4x³y³因式分解
原式= xy[(x+y)²-4x²y²]
=xy(x+y+2xy)(x+y-2xy)
xy(x+y)²-4x³y³因式分解
xy(x+y)²-4x³y³因式分解
xy(x+y)²-4x³y³因式分解
原式= xy[(x+y)²-4x²y²]
=xy(x+y+2xy)(x+y-2xy)