Sorry But I can't understand what − means so i will solve this for x+3 and x-3 first for x+3 equation e= x(x+3)(x+4)>0 so points are x= 0,-3,-4 for range x<-4 e<0 for -4<x<-3 e>0 for -3<x<0 e<0 and for x>0 e>0 so the interval when e>0 x â (-4<x<-3 and x>0)
now for x-3 equation e=x(x-3)(x+4)>0 so points are x= 0,3,-4 for range x<-4 e<0 for -4<x<0 e>0 for 0<x<3 e<0 and for x>3 e>0 so the interval when e>0 x â (-4<x<0 and x>3)
