✨ 最佳解答 ✨ Mer 2個月以前 x^8-1=(x^4)^2-1 =(x^4+1)(x^4-1) =(x^4+1)(x^2+1)(x^2-1) =(x^4+1)(x^2+1)(x+1)(x-1) Mer 2個月以前 排成-4x^3-12x+2x^4+9x^2+9 =-4x(x^2+3)(2x^2+3)(x^2+3) =(x^2+3)(2x^2+3-4x) 留言
排成-4x^3-12x+2x^4+9x^2+9
=-4x(x^2+3)(2x^2+3)(x^2+3)
=(x^2+3)(2x^2+3-4x)