(x+2((3-x)≤0 -6x^+7x>2求不等式解

问题描述:

(x+2((3-x)≤0 -6x^+7x>2
求不等式解

(x+2)(3-x)≤0等价于(x+2)(x-3)≥0 解得x≥3或x≤-2
-6x^+7x>2 即 6x^2-7x+2