Question

If f(x) = x2 - 3x, then find f(a + h) - f(a)

Answer 1

2h-3a

Explanation:

First Find f(a+h)

f(a+h) =-a-h

Then find f(a)

f(a) =2a-3h

Then f(a+h) - f(a)= - a-h-(2a-3h)=2h-3a