Answer: D.-6 and F.3
Step-by-step explanation:
The given rational number :
To find : The value of x , where the rational expression becomes equal zero.
Let's check all the options :
A. 7
At x= 7 ,
B. -7
At x= 7 ,
C. 6
At x= 6 ,
D. -6
At x= -6 ,
E. -3
At x= -3 ,
F. 3
At x= 3 ,
Thus, at x= -6 and 3 , the rational expression equals to zero .
So , the correct options are : D.-6 and F.3