Question

if f(x) = 8x^2 then what does f(x+h) = ?

Answer 1

Well, the difference between f(x) and f(x+h) is simply that x is replaced with x + h. So in your function f(x) = 8x^2, replace x with x + h. Thats all ya gotta do :)

Answer 2

oh goodness thanks!
i was attempting factoring and etc. lol

Answer 3

Yeah xD So another example just to show the idea. If I have f(x) = 7x^3 + 8x^2 - 3 and I ask to find f(x+y+z). Well, all that happened was x was replaced with x+y+z. So thats all you would do is make that replacement. So f(x+y+z) = 7(x+y+z)^3 + 8(x+y+z)^2 - 3.
Whatever is inside the f(__) you replace every x with.

Answer 4

ive attemted in it but i am being told it is still wrong here is what i did.
f(x) = 8x2 -->f(x+h)= 8 (x+h)^2 = 8x^2+16hx+h^2 what did i do wrong?

Answer 5

You didnt even need to foil it out. f(x+h) = 8(x+h)^2 is perfectly fine if it were up to me.

Answer 6

I did that too and still told it was wrong

Answer 7

If you actually had to foil it out, you'd have 8(x^2+2xh+h^2) = 8x^2 + 16xh + 8h^2

Answer 8

For the function, find and simplify f(x + h). (Expand your answer completely.)
f(x) = 8x2
f(x + h) =

Answer 9

Okay, expanded, so they want the 8x^2 + 16xh + 8h^2 answer.

Answer 10

oh i am an idiot I did not put 8h^2 i wrote in h^2 when I foiled it
hahahaha

Answer 11

thank you so much!!!!

Answer 12

Yep, np :)