lillybatternay lillybatternay

21-03-2020
Mathematics

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I can't seem to figure this one out, this is all the info that was given:
Given f(x)= x^2 + 2, find f(a+2) - f(a)

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MathPhys MathPhys

21-03-2020

Answer:

4a + 4

Step-by-step explanation:

f(x) = x² + 2

f(a) = a² + 2

f(a+2) = (a+2)² + 2

f(a+2) − f(a) = (a+2)² + 2 − (a² + 2)

f(a+2) − f(a) = a² + 4a + 4 + 2 − a² − 2

f(a+2) − f(a) = 4a + 4

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