# Completing the Square of Two Functions

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Taught by mrbrianmclogan
• Currently 4.0/5 Stars.
4763 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

This lesson teaches how to complete the square of a function in order to get it into standard form and find the vertex of a parabola. By factoring out negative one and adding a perfect square, the equation transforms into a standard form by getting the perfect square in the parentheses. The lesson also shows how to find the values for x by plugging f of x equal to zero and then solving.

Lesson Description:

Completing the square of two functions

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Questions answered by this video:
• How do I complete the square?
• How do I find the zeros of a quadratic function?
• How do I complete the square for the function f(x)=x^2+6x+8?
• How do I complete the square for the function f(x)=-x^2+2x+5?
• What are the zeros of the function f(x)=x^2+6x+8?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson gives two examples of completing the square. On one of the functions, the teacher goes on to show how to find the zeros of the function once you have completed the square.