G (x) = - x^3+4

f (x) = 4x-2

find (f-g) (3x)

(f-g) (3x) = 27x^3+12+2

Step-by-step explanation:

First lets write the following:

(f-g) (3x) = f (3x) - g (3x)

Now we need to find equivalent expression for f (3x) and for g (3x), we will obtaine them by evaluating 3x instead of x in every 'x' appearance.

Wi have>

g (3x) = - 27x^3+4

f (x) = 12x-2

Now, lets perfomr the desired operation.

f (3x) - g (3x) = 27x^3+12+2