Firstly, you want to multiply (f^4)^2. 
Next, multiply everything on the numerator. 
Next, divide. 
Now remember that f^-2 = (1/f^2), so just convert the negative powered exponent to that, and your answer will be 
Answer:
this is equal to √(3x²/12) = √(x²/4) = x/2
Step-by-step explanation:
The points in order from top to bottom are :
F
E
C
H
I