difference quotient?

Question

(x) = 5x-X^2, [f(5+h) - f(5) / h ] , h is not equal to 0

Directions: Find the difference quotient and simplify.
How would I do this?

Answer 1

Replace x in your function with (5 + h) to get f(5+h)
Do the same thing with 5 to get f(5).
Substitute these into the difference equation.
Simplify.