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Mathematics

392Zero Product Property
393Solving x² = c by Square Roots
394Solving Quadratics in Factored Form
395Standard Form and Setting Equal to Zero
396Solving by Factoring: Simple Trinomials
397Solving by Factoring: Leading Coefficient a ≠ 1
398Solving Special Forms: Difference of Squares
399Solving Special Forms: Perfect Square Trinomials
400Applications and Word Problems
401Perfect Square Trinomials Review
402Completing the Square with Leading Coefficient 1
403Solving Quadratics by Completing the Square (a = 1)
404Completing the Square with Non-Unit Leading Coefficient
405Solving General Quadratics by Completing the Square
406Converting to Vertex Form
407Finding the Vertex by Completing the Square
408Deriving the Quadratic Formula
409Complex Solutions via Completing the Square
410Applications and Problem Solving
411Deriving the Quadratic Formula by Completing the Square
412Understanding the Structure of the Quadratic Formula
413Using the Quadratic Formula: Basic Examples
414Solving Quadratics When a ≠ 1
415Simplifying Radical Answers
416The Discriminant: b² - 4ac
417Interpreting Discriminant Values
418Complex Solutions from the Quadratic Formula
419Choosing Between Factoring and the Formula
420Applications: Projectile Motion and Area Problems
421Verifying Solutions by Substitution
422Parabola Basics: Shape and Orientation
423Vertex Form of a Quadratic Function
424Finding the Vertex from Vertex Form
425The Axis of Symmetry
426Effects of Parameter a on Parabola Width
427Graphing Parabolas in Vertex Form
428Converting Standard Form to Vertex Form
429Finding the Vertex Using x = -b/(2a)
430Graphing Parabolas in Standard Form
431x-Intercepts and Zeros of Quadratic Functions
432Using the Discriminant to Predict Intercepts
433Key Features Summary and Complete Graphing
434Projectile Motion: Height and Time
435Area and Perimeter Optimization Problems
436Revenue and Profit Maximization
437Geometry: Pythagorean Applications
438Number and Consecutive Integer Problems
439Work and Mixture Rate Problems
440Distance-Rate-Time Problems with Quadratics
441Bridges, Cables, and Engineering Applications

Mathematics

392Zero Product Property
393Solving x² = c by Square Roots
394Solving Quadratics in Factored Form
395Standard Form and Setting Equal to Zero
396Solving by Factoring: Simple Trinomials
397Solving by Factoring: Leading Coefficient a ≠ 1
398Solving Special Forms: Difference of Squares
399Solving Special Forms: Perfect Square Trinomials
400Applications and Word Problems
401Perfect Square Trinomials Review
402Completing the Square with Leading Coefficient 1
403Solving Quadratics by Completing the Square (a = 1)
404Completing the Square with Non-Unit Leading Coefficient
405Solving General Quadratics by Completing the Square
406Converting to Vertex Form
407Finding the Vertex by Completing the Square
408Deriving the Quadratic Formula
409Complex Solutions via Completing the Square
410Applications and Problem Solving
411Deriving the Quadratic Formula by Completing the Square
412Understanding the Structure of the Quadratic Formula
413Using the Quadratic Formula: Basic Examples
414Solving Quadratics When a ≠ 1
415Simplifying Radical Answers
416The Discriminant: b² - 4ac
417Interpreting Discriminant Values
418Complex Solutions from the Quadratic Formula
419Choosing Between Factoring and the Formula
420Applications: Projectile Motion and Area Problems
421Verifying Solutions by Substitution
422Parabola Basics: Shape and Orientation
423Vertex Form of a Quadratic Function
424Finding the Vertex from Vertex Form
425The Axis of Symmetry
426Effects of Parameter a on Parabola Width
427Graphing Parabolas in Vertex Form
428Converting Standard Form to Vertex Form
429Finding the Vertex Using x = -b/(2a)
430Graphing Parabolas in Standard Form
431x-Intercepts and Zeros of Quadratic Functions
432Using the Discriminant to Predict Intercepts
433Key Features Summary and Complete Graphing
434Projectile Motion: Height and Time
435Area and Perimeter Optimization Problems
436Revenue and Profit Maximization
437Geometry: Pythagorean Applications
438Number and Consecutive Integer Problems
439Work and Mixture Rate Problems
440Distance-Rate-Time Problems with Quadratics
441Bridges, Cables, and Engineering Applications

← Mathematics

Lesson 411 of 3,121·11. Quadratic Equations and FunctionsPro lesson

Deriving the Quadratic Formula by Completing the Square

Derive the quadratic formula x = (-b ± √(b²-4ac))/(2a) by completing the square on ax² + bx + c = 0.

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