问题描述: (20-2x)(8-x)=126 1个回答 分类:数学 2014-09-30 问题解答: 我来补答 (20 - 2x)(8 - x) = 126(10 - x)(8 - x) = 63x² - 18x + 80 - 63 = 0x² - 18x + 17 = 0(x - 1)(x - 17) = 0x = 1 ,x = 17 展开全文阅读