9x'2-2y-y'2-6x因式分解

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9x'2-2y-y'2-6x因式分解
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9x'2-2y-y'2-6x因式分解
9x'2-2y-y'2-6x因式分解

9x'2-2y-y'2-6x因式分解
9x'2-2y-y'2-6x
=(9x²-y²)-(6x+2y)
=(3x+y)(3x-y)-2(3x+y)
=(3x+y)(3x-y-2)