Question

What is the vertex of the quadratic function below?

Answer 1

$y = - 3 {x}^{2} - 12x + 17 \\ x_0 = \frac{ - b}{2a } = \frac{12}{ - 6} = - 2 \\ y_0 = - 3 \times {( - 2)}^{2} - 12 \times ( - 2) + 17 = 29$

Maybe i did something wrong, maybe your question is incorrect, but the vertex is (-2; 29)