Question

Help!

Answer 1

help with what?

Answer 2

If \[f(x)= x ^{2}-2x\] , find \[\frac{ f ( x+h) - f (x) }{ h }\]

Answer 3

i don't know what any of that is because i am in 7th grade sorry

Answer 4

in the function f(x) replace x with x + h

Answer 5

so \[\frac{ (x+h) +h - (x+h) }{ h }\]

Answer 6

you have x^2 - 2 x
it becomes (x + h)^2 - 2(x + h)

Answer 7

\[\frac{ x ^{2}+ 2hx+ h ^{2}-2x-2h }{ h}\]

Answer 8

do not divide by h at this point

Answer 9

what do i divide by?

Answer 10

what we just did was to find f(x + h)
the complete problem
f(x + h) - f(x) then divide by h

Answer 11

now substituting in the original
f(x + h) = what you have for the numerator only
f(x) = what was given
f(x + h) - f(x) =
and then divide everything by h