Consider the function f(x) = 4x2 + 5. Find the value of f(x) when x = 2 and select the correct answer below. (5 points)

Question

onsider the function f(x) = 4x2 + 5. Find the value of f(x) when x = 2 and select the correct answer below. (5 points)


13
21
69
89

Answer 1

f(x) = 4x² + 5

 

To evaluate f(2), 

f(2) = 4(2)² + 5

 

Working through this

f(2) = 16 + 5 = 21  The answer is 21.