Question

What is the value of f(x) = 9x when x = -2?

Answer 1

Plug -2 for x

f(-2) = 9 * -2

Multiply

9 * -2 = -18

f(-2) = -18

So the value is -18.

Answer 2

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*(-2)=-18.`

Thus, the required value of f(x) when x = -2 is -18.