1. ## f(x)

f(x)=4x+3
solve f(x+h)-f(x)/h

2. (x+h)-f(x)/h

I cannot solve this, since there is nothing to solve. What's it equal to? Do you mean simplify?

3. it says break it down to one number.
4x+3 is given

4. Find F idk im losted

5. Well,
(x+h)-f(x)/h is equal to

= [h(x+h) - (4x + 3)] / h

= [h^2 + hx - 4x + 3] / h

= [h^2 + (h-4)x + 3) / h

EDIT:// with the question edited, it is now clear.

6. Do you mean?

$f(x)=4x+3$

$\frac{f(x+h)-f(x)}{h}$

if so...

Spoiler:

$\frac{(4(x+h)+3)-(4x+3)}{h}$

$\frac{4x+4h+3-4x-3}{h}$

$\frac{4h}{h}$

$4$

7. I dont get where the 4 come from

8. The h's cancelled.