NC.M2.A-REI.4a
Understand that the quadratic formula is the generalization of solving ax^2 + bx + c by using the process of completing the square.
Example Problems
What are the roots of the following quadratic function?
What are the roots of the following quadratic function?
What are the roots of the following quadratic function?
Khan Academy ResourcesUnderstanding the quadratic formulaSolving quadratics by completing the squareSolving quadratics by factoring reviewQuadratic formula proof reviewDiscriminant reviewSolving quadratics by taking square roots Quadratic formula reviewSolving quadratics by factoringQuadratic formulaQuadratics by factoring (intro)Quadratics by factoringQuadratics by taking square rootsSolve equations using structureNumber of solutions of quadratic equationsQuadratics by taking square roots (intro)Quadratics by taking square roots: with stepsQuadratics by taking square roots: strategyZero product propertyQuadratic equations word problem: triangle dimensionsQuadratic word problem: ballWorked example: quadratic formula (negative coefficients)Solving quadratics by taking square rootsThe quadratic formulaProof of the quadratic formulaSolving quadratics by factoringQuadratic equations word problem: box dimensionsWorked example: quadratic formula (example 2)Using the quadratic formula: number of solutionsZero product propertySolving quadratics by taking square roots examplesSolving quadratics by taking square roots: with stepsSolving quadratics by factoring: leading coefficient ≠ 1Quadratics by taking square roots: strategy
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