Find and Simplify.
f(x) = 5 − x^2
a)f(x + h) − f(x)
b)(f(x + h) − f(x))/h
a) I got 2xh+h^2
b) I got 2xh+h
I don't know what is wrong, but the answer is incorrect.
Thank you.
Yes, both incorrect.
f(x+h)-f(x)=5-(x+h)^2-5+x^2
= -2xh-h^2
f(x+h)-f(x)/h = above/h=-2x-h
