![]() ![]() ![]() :PĪs you can see, the x-coordinate of the vertex equals the number in brackets, but only up to change of signs. Here is an example:ĭein Browser unterstützt den HTML-Canvas-Tag nicht. You have to complete the square: Take the number in front of x, divide it by and square the result. This means: If the vertex form is, then the vertex is at (h|k). From the vertex form, it is easily visible where the maximum or minimum point (the vertex) of the parabola is: The number in brackets gives (trouble spot: up to the sign!) the x-coordinate of the vertex, the number at the end of the form gives the y-coordinate. The vertex form is a special form of a quadratic function.
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