Please help me someone Im having trouble solving these 2 problems. I am stuck your help would be greatly appreciated!!f(x) = 2x2 - 4x

Determine without graphing, whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.

Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = -x2 - 8x - 4