SOLUTION: find the difference quotient for f(x)=2x^2-5x-3. I have absolutely no idea.

Algebra ->  Functions -> SOLUTION: find the difference quotient for f(x)=2x^2-5x-3. I have absolutely no idea.      Log On


   

Question 101718: find the difference quotient for f(x)=2x^2-5x-3. I have absolutely no idea.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the difference quotient for f(x)=2x^2-5x-3.
-----------------
The difference quotient is [f(x+h)-f(x)]/h
-------------------
f(x+h) = 2(x+h)^2 -5(x+h) -3
= 2x^2+4hx+2h^2-5x-5h-3
--------------
Subtract f(x) from that to get:
=4hx+2h^2-5h
---------------
Divide by h to get:
=4x+2h-5
-------
That is the difference quotient of f(x)=2x^2-5x-3
===============
Cheers,
Stan H.