Question

3) Find f(3) for the function below.
f(x) = 2x² – 3x

Answer 1

f(3) = 9

Explanation:

`f(x) = 2x^2 -3x\\ f(3) = ?\\\\ f(3) = 2(3)^2 -3(3)\\ f(3) = 2(9) - 9\\ f(3) = 18- 9\\ f(3) = 9`

Answer 2

9

Explanation:

f(x) = 2x² – 3x

Let x=3

f(3) = 2 * 3^2 - 3*3

= 2 *9 - 9

= 18-9

= 9