The problem is:
I already know that it will end as 10x (it's derivative by the way).
But using the difference quotient:
I'm told that,
Can be written in the form
Using the Calculus short cuts. I find that "B" is (10) and I find that "C" is (0)
However I don't know what what "A" is.
And when I do it long hand, I get stuck at this point.
How do I get "10x" from that above and find "A"?