<span>B. 2d^2+6d-7. Should be the correct answer.</span>
        
             
        
        
        
Answer:
E , G, B
Step-by-step explanation:
I did it
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:

DE :
If y is a solution of given DE then it satisfied the DE.
Differentiate w.r.t t

Using the formula 

LHS:
RHS 

By using the formula 

LHS=RHs 
Hence, y is a solution of given DE

 
        
             
        
        
        
Answer:

Step-by-step explanation:

To simplify this expression, first use the distributive property to distribute  .
.

Simplify.

Combine like terms,  and
 and  .
.

The simplification of  is
 is  .
.
I hope this helps ^^
Good luck