Question

If f(x)x+12 and g( x)-2x, what is the value of (f -g)(144)?

Answer 1

First, we want to subtract function f minus function g to get a new function:

(f-g)(x)= x+12 - (-2x)
(f-g)(x)= x+12+2x
(f-g)(x)= 3x+12

Now, we want to plug in 144 for x:

(f-g)(144)=(3)(144)+12
(f-g)(144)=432 +12
(f-g)(144)=444

Therefore, the answer is 444