![]() International Journal of Mathematical Education in Science and Technology. "The legacy of Leonhard Euler – a tricentennial tribute". "A More Elegant Method of Deriving the Quadratic Formula". Modern college algebra and trigonometry, p. College algebra and trigonometry and precalculus, p. 56 (ProQuest, 2007): "The quadratic formula is the most general method for solving quadratic equations and is derived from another general method: completing the square." An Investigation of Secondary School Algebra Teachers' Mathematical Knowledge for Teaching Algebraic Equation Solving, p. ^ Rich, Barnett Schmidt, Philip (2004), Schaum's Outline of Theory and Problems of Elementary Algebra, The McGraw–Hill Companies, Chapter 13 §4.4, p.^ "Quadratic Formula", Proof Wiki, retrieved.^ Kahan, Willian (November 20, 2004), On the Cost of Floating-Point Computation Without Extra-Precise Arithmetic (PDF), retrieved.How to find axis from equation or from a graph. ![]() ^ "Understanding the quadratic formula". ![]()
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