问题描述: (x²-6x)(x²-6x+18)+81因式分解, 1个回答 分类:数学 2014-11-09 问题解答: 我来补答 (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 展开全文阅读