This video goes through the process of building the quadratic formula by completing the square on a general quadratic equation. If you are not familiar with the method of completing the square, don't forget to check out that video first. Remember when going through this process to simplify where possible and carefully keep track of all your terms.
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This video is related to many other topics. Check them out:
Solve a quadratic by completing the square: https://youtu.be/DUPpCrAspcE
Solve using the quadratic formula: https://youtu.be/JYop1qlKeEU
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