www.varsitytutors.com/hotmath/hotmath_help/topics/vertex-of-a-parabola.html

y=ax2+bx+c . But the equation for a parabola can also be written in "vertex form":
y=a(x−h)2+k. In this equation, the vertex of the parabola is the point (h,k) .

www.purplemath.com/modules/grphquad2.htm

... a quadratic's leading coefficient as it relates to the graph, and discusses the
vertex and how to find it. ... Also, if a is negative, then the parabola is upside-
down.

www.mathwarehouse.com/geometry/parabola/vertex-of-a-parabola.php

Vertex of a parabola, explained with pictures and examples and formulas.

www.khanacademy.org/math/algebra/quadratics/features-of-quadratic-functions/v/ex3-completing-the-square

Sal rewrites the equation y=-3x^2+24x-27 in vertex form (by completing the
square) in order to identify the vertex of the corresponding parabola.

www.ask.com/youtube?q=Finding the Vertex of a Parabola&v=rnkk0rC9Gyo

Jul 9, 2013 ... MIT grad explains how to find the vertex of a parabola. This is a simple, fast way
to identify the vertex, taken either from the equation of a ...

www.khanacademy.org/math/algebra/quadratics/features-of-quadratic-functions/v/quadratic-functions-2

Sal rewrites a quadratic equation in vertex form and shows how it reveals the
vertex of the corresponding parabola.

www.virtualnerd.com/algebra-1/quadratic-equations-functions/graphing/graph-basics/vertex-example

The vertex of a quadratic equation is the minimum or maximum point of the ...
problem; skill; vertex; parabola; quadratic function; maximum; minimum; max; min
...

mathbitsnotebook.com/Algebra1/Quadratics/QDVertexForm.html

definition. The vertex form of a quadratic function is given by f (x) = a(x - h)<sup>2</sup> + k,
where (h, k) is the vertex of the parabola.

www.wikihow.com/Find-the-Vertex-of-a-Quadratic-Equation

The vertex of a quadratic equation or parabola is the highest or lowest point of
that equation. It lies on the plane of symmetry of the entire parabola as well; ...

algebralab.org/lessons/lesson.aspx?file=Algebra_quad_vertex.xml

The vertex of a parabola is the high point or low point of the graph. The method
you use to find the vertex will depend on the form in which the function is given.