## vertex

### In mathematics, a vertex refers to a point where two or more lines or edges meet

In mathematics, a vertex refers to a point where two or more lines or edges meet. It is commonly used in geometry, graph theory, and algebra.

In geometry, a vertex is a point where two or more sides of a polygon intersect. For example, in a triangle, each of the three corners is a vertex.

In graph theory, a vertex represents an element or object within a graph. A graph consists of vertices (also known as nodes) connected by edges. Each edge represents a relationship or connection between two vertices.

In algebra, a vertex is often associated with a quadratic function or a parabola. Specifically, the vertex of a parabola is the highest or lowest point on its graph. It is the point where the parabola changes direction. If the parabola opens upwards, the vertex is the lowest point, while if it opens downwards, the vertex is the highest point.

To find the vertex of a quadratic function in the form of f(x) = ax^2 + bx + c, where a, b, and c are constants, you can use the formula x = -b / (2a) to find the x-coordinate of the vertex. To find the y-coordinate, simply substitute the x-coordinate into the equation.

It’s important to note that the concept of a vertex can vary depending on the context of the problem being solved. So, it’s always essential to understand how it is defined in the specific topic or branch of mathematics you are studying.

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