Thank you for the opportunity to help you with your question!
You have snapped it upside down and therefore am unable to see it well. However I will show you how to do this:
I guess this is the question
Given f(x)=2x2-1 find
Solve for F(2+h) first
F(2+h)= 2(2+h)2 -1
Solve (2+h) (2+h)
4+2h +2h +h2
Multiply it by 2 and adding gives
Solve for F(2)
Remember we replace every occurrence of x with with the given value
It is 2(2)2-1
Finish and solve
F(2+h)= h2+8h +7
Plugging them into the equation gives:
+8h +7 -7)/h
Factorize the upper part
Dividing it by h leaves us with
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