Question

Find f(5) if f (x) = x2 – 3x?

Answer 1

Answer: 10

Explanation:

Everywhere you see an x, replace it with 5. Then simplify using PEMDAS

f(x) = x^2 - 3x

f(5) = 5^2 - 3(5) ... plug in x = 5

f(5) = 25 - 15

f(5) = 10

Answer 2

Explanation:
f
(
5
)
=
3
(
5
)
+
2
f
(
5
)
=
17
Hopefully this helps.