Answer: The required value of f(x) when x = -2 is -18.
Step-by-step explanation: We are given to find the value of f(x) when x = -2 where f(x) is defined as follows :
\(f(x)=9x~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\)
To find the required value, we must substitute x = -2 in equation (i).
So, putting x = -2 in equation (i), we get
\(f(-2)=9\times(-2)=-18.\)
Thus, the required value of f(x) when x = -2 is -18.
