Vertex and Zeroes of a Quadratic Function

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Taught by mrbrianmclogan
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Meets NCTM Standards:
Lesson Summary:

In this lesson, we learn how to find the vertex and zeroes of a quadratic function. To find the vertex, we need to use the standard form and complete the square. Once we have the vertex, we can then find the x-intercepts using the quadratic formula. The x-intercepts are the values where y equals zero. By understanding how to find the vertex and zeroes of a quadratic function, we can better understand the behavior and shape of the graph.

Lesson Description:

Finding the vertex and zeros of a quadratic function

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Questions answered by this video:
  • How do you convert the general form of a quadratic to a standard form ?
  • What must you do to find the x-intercepts ?
  • What must be done to the coeffecient of x² before converting from general to standard form.?
  • What is the vertex in the following graph f(x)= 2(x+3)²-4?