Answer:
When x=4 we get the value of the given expression is

Step-by-step explanation:
Given rational expression is 
To find the value of the given rational expression 
when x is equal to 4 :
That is the value of the given rational expression 
when x=4 :

Put x=4 in the above rational expression we get




Therefore when x=4 we get the value of the given expression is
