(x²-6x)(x²-6x+18)+81因式分解,

分类: 作业答案 • 2023-01-14 20:51:55

问题描述：

答

(x²-6x)(x²-6x+18)+81
=(x²-6x+9 -9)(x²-6x+9 +9)+81
=(x²-6x+9)²-9²+81
=(x²-6x+9)²
=((x-3)²)²
=(x-3)^4