## anonymous 5 years ago the derivative of 4x^2 - 2x I need to know how to solve this using the derivative as a function... a.k.a. f(x+h)−f(x)/h

1. TuringTest

by the definition you mean...

2. anonymous

yes

3. TuringTest

easy, just expand the (x+h) parts

4. anonymous

yes, but do i just treat (x + h) as x?

5. TuringTest

top will be 4(x+h)^2-2(x+h)-(4x^2-2x) all over h do the algebra, then the limit will give the answer

6. anonymous

ok, that was what i needed thanks

7. TuringTest

welcome :)

8. anonymous

$\lim_{h \rightarrow 0} {[4(x+h)^{2}-2(x+h)-(4x ^{2}-2x)] \over h }$