{x一3(X一1)≤7,1一3分之2一5X
问题描述:
{x一3(X一1)≤7,1一3分之2一5X
答
(1)
(x-3)(x-1)≤7
x2-4x-4≤0
2-2√2≤x≤2+2√2
(2)
1-(2-5x)/3<x
x<-1/2