vertex = (-3, -11)
minimum
Step-by-step explanation:
The vertex of a parabola is its turning point (stationary point).
Therefore, the x-coordinate of the vertex can be determined by differentiating the function, setting it zero and solving for x:
Substitute found value for x into the original function to find the y-coordinate:
Therefore, the vertex is (-3, -11)
As the leading term of the quadratic function () is positive, the parabola will open upwards, so the vertex is its minimum point.