\(f(x) = x^2 - 4x - 320\) The function \(f\) is defined by the given …

Question

Prompt

f (x) = x^{2} - 4 x - 320

The function

f

is defined by the given equation. Which of the following equivalent forms of the equation displays the minimum value of the function as a constant or coefficient?

f (x) = x^{2} - 4 (x + 80)

f (x) = (x - 2)^{2} + (- 324)

f (x) = x (x - 4) + (- 320)

f (x) = (x + 16) (x - 20)