Question 981784
Let f(x)=x^2-2. Evaluate f(x+h)-f(x)/h for some nonzero constant h. You must show work. 

Okay so this is what I did, correct me if I am wrong

f(x)= ((x^2-2)+h)-x^2-2/h can someone help me with the rest?
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f(x)=x^2-2
Sub x+h for x
f(x+h) = (x+h)^2 - 2
= x^2 + 2hx + h^2 - 2
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f(x+h)-f(x)/h = {{{((x^2 + 2hx + h^2 - 2) - (x^2-2))/h}}}
= {{{2hx/h}}}
= 2x