Answer:
C = -80
Step-by-step explanation:
Solve for c by simplifying both sides of the equation, then isolating the variable.
 
        
                    
             
        
        
        
Answer:
3200/560000983663562666663672
 
        
             
        
        
        
No because it would be
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be

 or 

so 
if w^2-9w+81 is perfect square, factored form is either 

 or 

  aka 

 or  
 
 expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not