Question 1019896
a.  No.  When x=0, x^2 is the smallest it can be.  This is not clear, f(x)=4?  If it is f(x)+4, the answer is still no.
b.  Not clear, but if if it is f(x)-5, then it will have zeros at -1 and 1, because when x=0, f(x) is -1, and when x is greater than 1, the function is positive.  Therefore, it has to cross the x-axis
c.  f(x-2)  All this does is shift the graph to the right. 
d. f(x+4).  This shifts the graph to the left, and it will not have zeros.