因式分解:9(3x-2y)(x-3y)+15(2y-3x)(5x-y)

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因式分解:9(3x-2y)(x-3y)+15(2y-3x)(5x-y)
因式分解:9(3x-2y)(x-3y)+15(2y-3x)(5x-y)

因式分解:9(3x-2y)(x-3y)+15(2y-3x)(5x-y)
9(3x-2y)(x-3y)+15(2y-3x)(5x-y)
=9(3x-2y)(x-3y)-15(3x-2y)(5x-y)
=3(3x-2y)[3(x-3y)-5(5x-y)]
=3(3x-2y)(-22x-4y)
=-6(3x-2y)(11x+2y)