Question

What is the vertex of the function?

Answer 1

Answer:

(4 , -25)

Step-by-step explanation:

that is the procedure above

Answer 2

the vertex of the parabola is calculated by the formula                                          

$\displaystyle\ ax^2+bx+c\quad ;\quad \boxed{x_0=\frac{-b}{2a} \ \ ;\quad y_0 =ax_0^2+bx_0+c} \\\\x_0=-\frac{-8}{2} =4 \quad ; \ \ y_0 =16-32-9=-25 \\\\\ \ Answer: Coordinates \ \ of \ the \ vertex \ of \ the \ \ parabola \ \ (4;-25)$