Question

What is the vertex of the function?

Consider the quadratic function:
f(x) = x2 - 8x - 9
Vertex: (zo
(2)

Answer 1

the vertex of the parabola is calculated by the formula

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

Answer 2

(4 , -25)

Explanation:

that is the procedure above