what is the vertex

A vertex is a point where two or more curves, lines, or edges meet or intersect). In geometry, a vertex is a corner point of a polygon, polyhedron, or other higher-dimensional polytope, formed by the intersection of edges, faces, or facets of the object). The vertex of a parabola is the point of intersection of the parabola and the axis of symmetry. In a quadratic equation, the vertex is the minimum or maximum point of the equation. The vertex of a quadratic function is the absolute minimum (in the case of an upward-opening parabola) or maximum (in the case of a downward-opening parabola) of that function. The vertex of an equation can be written as opposite of b all over 2 times a, comma f of that point.