问题描述: what are all values of x for which 4-x^2≥x-2? 1个回答 分类:英语 2014-10-23 问题解答: 我来补答 4-X^2》X-2变换一下X^2+X-6《0(X+3)(X-2)《0因此-3《X《2 展开全文阅读