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

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

... in the examples). Also, if a is negative, then the parabola is upside-down. ... Find the vertex of y = 3x2 + x – 2 and graph the parabola. To find the vertex, I look ...

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

Vertex of a parabola, explained with pictures and examples and formulas. ... The vertex of a parabola is the highest or lowest point, also known as the maximum ...

www.khanacademy.org/math/algebra/quadratics/quad-standard-form-alg1/v/ex3-completing-the-square

Sal rewrites the equation y=-5x^2-20x+15 in vertex form (by completing the square) in order to identify the vertex of the corresponding parabola.

www.khanacademy.org/math/algebra/quadratics/vertex-form-alg1/v/quadratic-functions-2

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

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 ...

www.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.

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; ...

www.ixl.com/math/algebra-2/find-the-vertex-of-a-parabola

Fun math practice! Improve your skills with free problems in 'Find the vertex of a parabola' and thousands of other practice lessons.