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Answer:  A) f (x) = (x-5) (x+8)
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Step-by-step explanation: Please tell me if this is wrong! Bye! Have a good day!</em></u></h2>
 
        
        
        
When b=0
f(x)=ax^2+c
test each
A. with x^2-1, A is false
B. with -x^2-1, B is false
C. cannot find contradiction
D. the axis is actually x=0, 0 is nithere positive nor negative, false
answer is C
        
                    
             
        
        
        
8.49 x 10⁻⁷  =  0.000000849
        
                    
             
        
        
        
But actually its based on your luck