Functions aren't my thing...

[elisemd]

I am working on a math pre-test, and I came onto this problem:

Find f(x+h) - f(x) where f(x) = 3x^2 + 4x-6

I don't know where the heck to put that h or how that even works into the problem. I'm pretty much lost on that one. Please help me understand what it wants me to do.

~Elise...having a hard hard night...

 

[sisxixon]

Find f(x+h) - f(x) where f(x) = 3x^2 + 4x-6

Merely plug it in:

f(x+h)= 3(x+h)^2+4(x+h)-6

f(x)= f(x) = 3x^2 + 4x-6

f(x+h) - f(x) = 3(x+h)^2+4(x+h)-6 - (f(x) = 3x^2 + 4x-6 )

you do the rest =P

 

[elisemd]

Is this right?

I got:

6xh + 3h^2 +4h

Is that right??

 

[sisxixon]

yes ma'am, it is.

(is this considered spam?)