The function f is defined by fx x2 3 Which of the following

The function f is defined by f(x) =x^2 + 3. Which of the following is equal to f(x + 5)?

Solution

Given f(x) = x^2 + 3

we need to find the f(x+5)

in order to find f(x+5) we replace \"x\" in f(x) by \"x+5\"

therefore

f(x+5) = (x+5)² +3

          = x² + 10x +25 + 3

          = x² + 10x + 28

option e)