Question

The domain for f(x) and g(x) is the set of all real numbers.

Answer 1

Hey there,

Your question states: 

The domain for f(x) and g(x) is the set of all real numbers.

Let f(x) = 3x + 5 and g(x) = x2.

Find g(x) − f(x).

So, if $\boxed{\boxed{f(x) = 3x + 5 \ and \ g(x) = x2.}}$, and what we are trying to figure out is $g(x) - f(x)$, would would have ti find an expression that would by means fit with f(x) = 3x + 5 and g(x) = x2.

I would say that the answer would be x2 − 3x − 5.

By plugging in the f(x) = 3x + 5 and g(x) = x2, I believe that this would make more sense.

Hope this helps.
~Jurgen

Answer 2

G(x) − f(x) = x^2 - ( 3x + 5)
g(x) − f(x) = x^2 - 3x - 5

answer is A. first one
x^2 - 3x - 5