Originally Posted by

**insomniac17** It's the derivative, my bad. I have a question on the second step. When you have the two fractions on top, and the h on bottom, you find a common denominator for the top, right? Then in the second step, you have the "h" that was underneath all that in the denominator. I though that since it was on the bottom of the fraction (beneath the num and denom on top) that it would multiply out and be on the top of the fraction when all is said and done... Can you explain that a bit more?

Everything else makes a ton of sense though; I think if I get that one step cleared up that I can get it. Thanks a ton for the help!