Start studying Algebra 2 Khan Academy studies. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Your equation needs to equal zero on one side before the quadratic equation will work. It has to do with the way the quadratic equation is derived, and I don't have time or tools to provide the details. Check out a video on deriving the quadratic equation if you are interested (there are dozens of good explanations on the internet).

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May 20, 2019 · Topics covered from very basic algebra all the way through algebra II. This is the best algebra playlist to start at if you've never seen algebra before. Onc... The quadratic formula can always be used to find the roots of a quadratic equation, regardless of whether the roots are real or complex, whole numbers or fractions, and so on. Criteria For Use. To use the quadratic formula, two criteria must be satisfied: The quadratic equation must equal zero; [latex]ax^2+bx+c=0[/latex] Khan Academy's Algebra 1 content might best be used to help kids check their understanding once you've already covered a topic in class. The quizzes at the end of each tutorial can be used for homework or as an in-class formative assessment. Watch this great education playlist, Quadratic equations | Algebra I | Khan Academy. Khan Academy Description Khan Academy is a 501(c)(3) nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere.