Question

evaluate the difference quotient for the function f(x).

Answer 1

PROBLEM: f(x)=5x^2-4x-5

Answer 2

ok so first we need to calculate f(x+h)=5(x+h)^2-4(x+h)-5
than we calculate (f(x+h)-f(x))/h= (5x^2+10xh+5h^2-4x-4h-5-5x^2+4x+5)/h
There is a lot of cancellation and the result is: 10x+5h-4

Answer 3

clear?