2xy²-x²y-y³(分解因式)
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2xy²-x²y-y³(分解因式)
2xy²-x²y-y³(分解因式)
2xy²-x²y-y³(分解因式)
2xy²-x²y-y³
=-y﹙x²-2xy+y²﹚
=-y﹙x-y﹚²
2xy²-x²y-y³
=-y(x²-2xy+y²)
=-y(x-y)²
xy^2 -x^2 y + xy^2 -y^3
=xy(y-x) + y^2 (x-y)
= y(y-x)(x-y)
=-y(x-y)^2
楼上答案都正确