Question

• function notation• these are so confusing

Answer 1

Answer:

15

Step-by-step explanation:

Just substitute the x for 5
In this case:

Original function: f(x) = $x^{2}$ - 2x

Substitute function: f(5) = $(5)^{2}$ - 2(5)

Now solve for the substitute function

$(5)^{2}$ - 2(5)

25 - 10

15

Therefore, f(5) is equal to 15