Completing the Square and Finding x Intercepts
At about the 6:55 mark, the teacher says -1+2 is -1; he should have said that -1+2 is 1.
In this lesson, we learn about completing the square and finding the x-intercepts of a quadratic equation. Completing the square allows us to put the equation in standard form, making it easier to identify the vertex and find the x-intercepts using the quadratic formula. By demonstrating step-by-step how to complete the square, the teacher shows how to rewrite the equation in a binomial squared form, making it easier to factor and find the zeros of the function.
Completing the square and finding the x intercepts
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- How do I complete the square?
- How do I find the zeros of a polynomial by completing the square?
- How do I complete the square for the function f(x)=x^2+2x-3?
- What are the zeros of the function f(x)=x^2+2x-3?
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Staff Review
This lesson gives an example of how to complete the square when you are given a quadratic function. Then it shows how to find the zeros of the function once you have completed the square.
