Answer:
D.
or 
Step-by-step explanation:
The given equation is:

Divide through by 3;

Add the square of half the coefficient of x to both sides.


The left hand side is now a perfect square:

Take square root



D.
or 
3/4 is the greatest the person that replied to you up there is incorrect 3/4 is the real answer
The answer will be C. OR 3. 11−<span>13<span>i</span></span>