求过程4x^2-6x-12xy+18y
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求过程4x^2-6x-12xy+18y求过程4x^2-6x-12xy+18y求过程4x^2-6x-12xy+18y4x^2-6x-12xy+18y=2x(2x-3)-6y(2x-3)=(2x-6y)(
求过程4x^2-6x-12xy+18y
求过程4x^2-6x-12xy+18y
求过程4x^2-6x-12xy+18y
4x^2-6x-12xy+18y
=2x(2x-3)-6y(2x-3)
=(2x-6y)(x-3)
=2(x-3y)(x-3)
4x^2-6x-12xy+18y
=(4X^2-6X)-(12XY-18Y)
=2X(2X-3Y)-6Y(2X-3Y)
=(2X-3Y)(2X-6Y)
=2(2X-3Y)(X-3Y)
这题要干嘛？