Question

Use the function rule ƒ(x) = x^2 – 5x + 1. Find the output ƒ(–3).
A.7
B.–5
C.25
D.5

Please help me, i've been stuck on this for a while and have no clue how to do the first step. Can someone give me explaination?

Answer 1

Sure...

See f(-3) means simply that you will put x = -3 there in your expression \(x^2 - 5x + 1\)..

Answer 2

f(x) : f(-3) ---> x = -3

Answer 3

So, you will get:

\[f(x) = x^2 -5x + 1\]

Put x = -3 here:

\[f(-3) = (-3)^2 - 5(-3) + 1\]

Solve now on your own..

Answer 4

f(x) = x^2 -5x + 1, f(-3) ---> x = -3

f(-3) = (-3)^2 - 5(-3) + 1

Answer 5

C. 25?

Answer 6

Whats with the question mark??

Answer 7

Asking if that the answer.

Answer 8

(-3)^2 -5(-3) + 1 = 9 + 15 + 1 = 25

period.

Answer 9

Have faith in yourself..

Answer 10

Yes, you are right...

Answer 11

Oh ok this makes sense, thank you very much guys.

Answer 12

@kard192 np

Answer 13

You are welcome dear..