9a²b-6ab²+b²,6x²-12xy+6y² 4x²y
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9a²b-6ab²+b²,6x²-12xy+6y² 4x²y-y³ 分解因式,
(1)
9a^2b-6ab^2
=3ab(3a-2b)
(2)
6x^2-12xy+6y^2
=6(x^2-2xy+y^2)
=6(x-y)^2
(3)
4x^2y-y^3
=-y(-4xy+y^2)
9a^2b-6ab^2
=3ab(3a-2b)
(2)
6x^2-12xy+6y^2
=6(x^2-2xy+y^2)
=6(x-y)^2
(3)
4x^2y-y^3
=-y(-4xy+y^2)
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