Answer:
 or 12.57
 or 12.57
Step-by-step explanation:
 or 12.57
 or 12.57
 
        
                    
             
        
        
        
Answer:
-13
Step-by-step explanation:
2x²+26x+156=0
x²+13x+78=0
x²+13x=-78
x²+13x+169/4=-143/4
(x+13/2)²=-143/4
x+13/2=(i√143)/2 or x+13/2=-(i√143)/2
x=(i√143)/2-13/2 or x=-(i√143)/2-13/2 
(i√143)/2-13/2+(-(i√143)/2)-13/2=(i√143-13-i√143-13)/2=-26/2=-13
 
        
                    
             
        
        
        
Answer: Last option.
Step-by-step explanation:
 For this exercise you need to find the Discriminant. 
 The formula used to find the Discriminant, is the following:
 
 In this case, given the Quadratic equation:
 
 You can identify that:
 
 Knowing those values, you must substitute them into the formula and then you must evaluate in order to find the Discriminant. 
 You get that this is:
 
 By definition, if:
   
 
 Then the Quadraitc equation has 2 nonreal solutions.
 
        
             
        
        
        
A is a good answer because yes
        
             
        
        
        
A Beards, Beards where a fashion choice back then, just like how wemon had black teeth and white painted faces!