Solution:
The function is, f(x)= 
It can be Written as, 
The given equation is of Parabola, opening below , X axis.
The vertex of Parabola is , (-1 , 0).
Comparing with general equation of Parabola ,

The focus of the given parabola is obtained by, putting , x+1=0,gives, x=-1,So focus will be, 
And equation of Directrix is, 
Line, x=-1, divides the parabola into two symmetrical Parts.