If Z= Y^2 + d W+ 9 does not cut the x-axis, then which of the following could be a possible value of d?
I. 0
II. -3
III. 9  Choose the correct choice from the following:
A) III only
B) II only
C) I and II only
D) II and III only
E) I and III only
Here C is the answer as A and B statements will provide the discriminant to be negative thereby making the x axis cutting impossible.   Hence only 1 and 2   thus I and II only
<result>C</result>
If Z= Y^2 + d W+ 9 does not cut the x-axis, then which of the following could be a possible value of d?
I. 0
II. -3
III. 9