Question

Given f(x) = x^2 + 2, Find f(a+2) - f(a)

Answer 1

Have you attempted this?

Answer 2

Yes.

Answer 3

what did you get?

Answer 4

I wasn't sure how to get to the final answer, but f(a) = a^2 + 2; f(a+2)^2 +2. Correct?

Answer 5

f(a+2) = (a+2)^2 + 2

Answer 6

Yes. I missed the first part f(a+2). But how should I proceed?

Answer 7

well f(a+2) - f(a)
= (a+2)^2 +2 - (a^2+2)

and go from there

Answer 8

@alekos my final answer was 8 correct?

Answer 9

No. Following on we get....

(a^2+4a+4)+2 - a^2 - 2

try the next step

Answer 10

4 + 4a..yeah ..he is guiding u correct ..:)

Answer 11

My final answer was 4a + 4

Answer 12

Yep, that's it! well done

Answer 13

@alekos Thank you. You're a lifesaver!

Answer 14

No problem, you're most welcome