问题描述: (x-1)(x-3)(x-5)(x-7)-9 因式分解 1个回答 分类:综合 2014-09-24 问题解答: 我来补答 (x-1)(x-3)(x-5)(x-7)-9 =(x-1)(x-7)(x-3)(x-5)-9=(x²-8x+7)(x²-8x+15)-9=(x²-8x)²+22(x²-8x)+105-9=(x²-8x)²+22(x²-8x)+96=(x²-8x+6)(x²-8x+16)==(x²-8x+6)(x-4)² 展开全文阅读