是x³+3x²-2x-6吧?x³+3x²-2x-6=x²(x+3)-2(x+3) =(x+3)(x²-2) =(x+3)(x-√2)(x+√2) 祝你开心!希望能帮到你,如果不懂,请追问,祝学习进步!O(∩_∩)O
x³+3x²-2x-6=x²(x+3)-2(x+3)=(x+3)(x²-2)=(x+3)(x+√2)(x-√2)