sgn = 1 ,x>0
= 0 ,x=0
= -1 .x2
case 1 :x>0
(x+1)sgnx>2
x+1>2
x > 1
solution of case 1:x >1
case 2:x=0
LS = (x+1)sgnx = 0
RS= 2
no solution for case 2
case 3 :x2
-(x+1)>2
x
sgn = 1 ,x>0
= 0 ,x=0
= -1 .x2
case 1 :x>0
(x+1)sgnx>2
x+1>2
x > 1
solution of case 1:x >1
case 2:x=0
LS = (x+1)sgnx = 0
RS= 2
no solution for case 2
case 3 :x2
-(x+1)>2
x