Question 50818
If f(x)=x^2+5 find f(a+h)-f(a)
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f(a+h)= (a+h)^2+5
=a^2+2ah+h^2+5
f(a)=a^2+5
Then f(a+h)-f(a)= 2ah+h^2

Cheers,
Stan H.