9x'2-2y-y'2-6x因式分解
问题描述:
9x'2-2y-y'2-6x因式分解
答
9x'2-2y-y'2-6x
=(9x²-y²)-(6x+2y)
=(3x+y)(3x-y)-2(3x+y)
=(3x+y)(3x-y-2)