急:因式分解:3x^3-12xy^2

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急:因式分解:3x^3-12xy^2
急:因式分解:3x^3-12xy^2

急:因式分解:3x^3-12xy^2
3x^3-12xy^2
=3x(x^2-4y^2)=3x(x-2y)(x+2y)

3x^3-12xy^2
=3x(x^2-4y^2)
=3x(x+2y)(x-2y)

3x^3-12xy^2
=3x(x^2-4y^2)
=3x(x-2y)(x+2y)

=3x(x^2-4y^2)
=3x(x+2y)(x-2y)