Question

F(x)=4x-3 G(x)=x^3+2x Find (f-g)(x)

Answer 1

You gotta remember that $(f-g)(x)$ means $f(x) - g(x)$.

So, in this case, f(x) is [4x - 3], g(x) is [x^3 + 2x].
So that : f(x)-g(x) = [4x-3] - [x^3+ 2x] = -x^3 + 4x - 2x - 3 = -x^3 + 2x - 3