(x+1)(1-x)>0
первая система
(x+1)>0 x>-1
(1-x)>0 x<1<br>\\\\\\\\\\\\\\\\\\\\\\\\
|____-1______1_______________
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
x∈(-1; 1)
вторая система
(x+1)<0 x<-1<br>(1-x)<0 x>1
\\\\\\\\\\\\\\\\
_______-1_____1_____________
\\\\\\\\\\\\\\\\\\\\\\\\\\
решений нет
Ответ : x∈(-1; 1)