Answer:
After solving we get (f.g)(5)=-115
But the correct option is not given in the question.
Step-by-step explanation:
We are given:
We need to find (f.g)(5)
First we will multiply f and g to find (f.g) i.e
Now putting x=5
So, after solving we get (f.g)(5)=-115
But the correct option is not given in the question.
Answer:
x=-8
Step-by-step explanation:
on squaring both sides
either x-2=0 or x+8=0
either x=2 or x=-8
Putting x=2 in original equation, we get
7=7 hence, it is not an extraneous solution
Putting x=-8 in original equation
i.e. 3=-3
Hence, x=-8 is an extraneous solution (since it doesn't satisfy the original equation)
