Math question?

Question

Find the difference quotient:
For f(x) = x^2 - x + 1

Find f(2+h) - f(2) /h

h is unequal to 0. Any help with this would be great.

Answer 1

It's been a long time, but I think
f(2+h)= (2+h)^2 - (2+h) +1, which equals h^2 + 3h
f(2) = 2^2 -2 + 1, which equals 3

so f(2 +h) -f(2)/h = h^2 + 3h -3/h

simplify = h

Answer 2

I forgot, but I think you can find it on some math site,