Question

What is f(x) + f(x) + f(x)?

✔ 3f(x)
3f(x) =
✔ 3x²
Evaluate 3f(2) =
.

Answer 1

12

Explanation:

The problem statement tells us the definition of 3f(x). In order to find the value of 3f(2), we substitute 2 for x and do the arithmetic.

__

definition

3f(x) = 3x² . . . . given

application

3f(2) = 3·2² = 3·4 = 12 . . . . . substitute 2 for x

The value of 3f(2) is 12.