Question 94029
f(x) = x^2 + 5
f(a + h) = (a + h)^2 + 5 = a^2 + 2ah + h^2 + 5
f(a) = (a)^2 + 5 = a^2 + 5
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f(a + h) - f(a)
(a^2 + 2ah + h^2 + 5) - (a^2 + 5)
a^2 + 2ah + h^2 + 5 - a^2 - 5
2ah + h^2