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

Let f(x) = x2 + 1 and g(x) = 3x.

Find f − g.

A.

x2 + 3x + 1

B.

x2 + 3x

C.

3×3 + 3x + 1

D.

x2 − 3x + 1

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

Let f(x) = x2 + 1 and g(x) = 3x.

Find f − g.

A.

x2 + 3x + 1

B.

x2 + 3x

C.

3×3 + 3x + 1

D.

x2 − 3x + 1