解不等式 (2x+1)(x-3)-(2x+3)(x-1)>=12

分类: 作业答案 • 2022-07-08 08:36:44

问题描述：

答

(2x+1)(x-3)-(2x+3)(x-1)>=12
(2x^2-5x-3)-(2x^2+x-3)>=12
2x^2-5x-3-2x^2-x+3-12>=0
-6x-12>=0
6xx

答

2x^2-5x-3-2x^2-x+3-12>=0
6x

答

(2x+1)(x-3)-(2x+3)(x-1)>=12
2x^2-5x-3-(2x^2+x-3)>=12
-6x>=12x
x

答

2x*x-5x-3-2x*x-x+3=-6x>=12
所以x