How to use the quadratic formula | Polynomial and rational functions | Algebra II | Khan Academy

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In this lesson, I will reveal what you consider One of the five most useful formulas In mathematics. If I have previously seen a number of my lessons, you will know that I am not a motivator On the save. Nevertheless I advise you to remember it And study how to prove it Because it is not a good idea to remember things Without knowing where it came from

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