Question

If f(x) = 3x and g(x) = x^2, then what is f(g(x))?

Answer 1

3x^2.

Explanation:

We replace the x in f(x) by g(x):

f(g(x)) = 3 * x^2

= 3x^2.

Answer 2

3x^2

Explanation:

f(x) = 3x

g(x) =x^2

f(gx)

substitute in the given information

f(x^2)

since f(x) = 3x

then

f(x^2) = 3x^2