4x²y-12xy²+9y³

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4x²y-12xy²+9y³4x²y-12xy²+9y³4x²y-12xy²+9y³4x²y-12x

4x²y-12xy²+9y³
4x²y-12xy²+9y³

4x²y-12xy²+9y³
4x²y-12xy²+9y³
=y(4x²-12xy+9y²)
=y(2x-3y)².

因式分4x²y-12xy²+9y³
=y(4x²-12xy+9y²)
=y(2x-3y)²。