Answer:
(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
