Hi the answer is 80cm^2. I just need help with the work:)

f(x) - g(x) = 4x³+2x²+2x

Step-by-step explanation:

We have given two function:

f(x) = 9x³+ 2x²- 5x+4

And g(x) = 5x³ - 7x+4

We have to find f(x) - g(x).

f(x) - g(x) = [9x³+ 2x²- 5x+4] - [5x³ - 7x+4]

f(x) - g(x)  = 9x³+ 2x²- 5x+4-5x³+7x-4

f(x) - g(x) =  9x³-5x³+ 2x²- 5x+7x-4+4

f(x) - g(x) = 4x³+2x²+2x is the answer.