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.
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?
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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.