数学题……分解因式1、x^2+9y^2-6xy-x - 知识问答

数学题……分解因式1、x^2+9y^2-6xy-x+3y-122、2x^2-3y-2y^2+3x

1个回答

1.
x^2+9y^2-6xy-x+3y-12
=(x-3y)^2-(x-3y)-12
=(x-3y-4)(x-3y+3)
2.
2x^2-3y-2y^2+3x
=2(x+y)(x-y)+3(x-y)
=(x-y)(2x+2y+3)
:)

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