(6x+5)(4X-7)-(3X+2)(8X-9)
问题描述:
(6x+5)(4X-7)-(3X+2)(8X-9)
答
24X²+42X+20X+35-(24X²+27X+16X-18)<-61
19X+53<-61
19X<-114
X<-6