The quadratic equation:
4x^2 + 34x + 60 = 0
4x^2 + 24x + 10x + 60 = 0
4x(x + 6) + 10(x + 6)
(4x + 10) (x + 6)
x = - 6 , - 5/2
the answer is : c. -6, -5/2
hope this help
        
                    
             
        
        
        
Solve for x in the second equation first
        
                    
             
        
        
        
Can you explain more of what you're asking please or saying?
        
             
        
        
        
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Answer: 
A
Step-by-step explanation 
You can divide 6x,9y and -15 by 3 
6x/3=2x
9y/3=3y
-15/3=(-5)
Combine them to get the factored form of 6x+9y-15: 
3(2x+3y-5)