(x+x)^2-8(x^2+x)+12
=(x^2+x-6)(x^2+x-2)
=(x+3)(x-2)(x+2)(x-1)
不懂可追问,有帮助请采纳,谢谢!
(x+x)²-8(x²+x)+12
=(2x)²-8x²-8x+12
=4x²-8x²-8x+12
=﹣4x²-8x+12
=-4(x²+2x-3)
=-4(x+3)(x-1)
(x^2+x)^2-8(x^2+x)+12
=(x²+x-6)(x²+x-2)
=(x+3)(x-2)(x+2)(x-1)
(x^2+x)^2-8(x^2+x)+12
=[(x^2+x)-6][(x^2+x)-2]
=(x+3)(x-2)(x+2)(x-1)