Act. 4ª:Jaqueline J. LugoPRIMERA PARTE:AP21)A-

(X+1)(X+3)<0x+1=0x+3=0

x=-1 x=-3

x<−3−3<x<−1

−1<x−3<x<−1(−3;−1)

SEGUNDA PARTE:

(X+1)(X+3)>0X+1=0X+3=0

X=-1 x=-3X<-3

-3<x<-1-1<x

X<-3 o x>-1(-∞;3)∪(-1;∞)