Question

if f(x)=x^2+5,find f(x+2)-f(x-2)​

Answer 1

Answer:

8x

Step-by-step explanation:

f(x) = x² + 5

∴ f(x+2) - f(x-2) = (x+2)² + 5 - (x-2)² - 5

                        =  (x+2)² - (x-2)²

                        =  (4x)×2 = 8x