$$f'\left(x\right)=\ 24\ x^3\ +\ 6x^2\ -6$$  

$$f'\left(x\right)=\ 24\ x^2\ +\ 6x^{ }\ -6$$  

$$f'\left(x\right)=\ 24\ x^3\ +\ 6x^{ }\ -6$$  

$$f'\left(x\right)=\ 24\ x^3\ +\ 6x^2\$$  

$$f'\left(x\right)=\ 24\ x^2\ +\ 6x^{ }\$$  

$$f'\left(x\right)\ =\frac{9}{\left(x-4\right)^2}$$  

$$f'\left(x\right)\ =\frac{-9}{\left(x-4\right)^2}$$  

$$f'\left(x\right)\ =\frac{-9}{\left(x-4\right)^3}$$  

$$f'\left(x\right)\ =\frac{8}{\left(x-4\right)^3}$$  

$$f'\left(x\right)\ =\frac{-8}{\left(x-4\right)^2}$$  

$$f'\left(x\right)=6\left(2x+4\right)^{ }$$  

$$f'\left(x\right)=6x\left(2x+4\right)^{ }$$  

$$f'\left(x\right)=6\left(2x+4\right)^2$$  

$$f'\left(x\right)=6x\left(2x+4\right)^2$$  

$$f'\left(x\right)=6\left(2x+4\right)^3$$  

-9

7

8

9

-8