The answer is 
5mn(KUASA DUA) -6gh(KUASA DUA) +2
        
             
        
        
        
Answer: A.  .
 .
Step-by-step explanation:
- A difference of squares problem is factored as : 
- For this both terms in the form of squares and a minus sign between them.
From all the options only option A has both terms square and they minus sign between them.
Also, 
Here a= 3x and b= 4
Hence, the correct answer is A.  .
 .
 
        
             
        
        
        
65 times 5 is 325 then u take 1000 and minus 325 from it and end up with 675
        
                    
             
        
        
        
Answer:
18) 6x^2-7x-5
19) 20x^2+17x-63
20) 18x^2-20x+2
21) 5x^2+42x+16
Step-by-step explanation:
Perimeter=length×breadth
18) (3x-5)(2x+1)
 =6x^2+3x-10x-5
 =6x^2-7x-5
19) (4x+9)(5x-7)
 =20x^2-28x+45x-63
 =20x^2+17x-63
20) (18x-2)(x-1)
 =18x^2-18x-2x+2
 =18x^2-20x+2
21) (5x+2)(x+8)
 =5x^2+40x+2x+16
 =5x^2+42x+16
 
        
             
        
        
        
4:9
24:x
Set up a proportion
4/9=24/x
4x=216
x=54
a) 54 is your answer
hope this helps, and please give brainliest if it does!