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This module is from Elementary Algebra</link>by Denny Burzynski and Wade Ellis, Jr. Methods of solving quadratic equations as well as the logic underlying each method are discussed. Factoring, extraction of roots, completing the square, and the quadratic formula are carefully developed. The zero-factor property of real numbers is reintroduced. The chapter also includes graphs of quadratic equations based on the standard parabola, y = x^2, and applied problems from the areas of manufacturing, population, physics, geometry, mathematics (numbers and volumes), and astronomy, which are solved using the five-step method.This module contains the objectives for the chapter "Quadratic Equations".

After completing this chapter, you should

    Solving quadratic equations ( [link] )

  • be able to place a quadratic equation into standard form
  • be familiar with the zero-factor property of real numbers

    Solving quadratic equations by factoring ( [link] )

  • be able to solve quadratic equations by factoring

    Solving quadratic equations using the method of extraction of roots ( [link] )

  • be able to solve quadratic equations using the method of extraction of roots
  • be able to determine the nature of the solutions to a quadratic equation

    Solving quadratic equations using the method of completing the square ( [link] )

  • understand the logic underlying the method of completing the square
  • be able to solve a quadratic equation using the method of completing the square

    Solving quadratic equations using the quadratic formula ( [link] )

  • recognize the standard form of a quadratic equation
  • understand the derivation of the quadratic formula
  • solve quadratic equations using the quadratic formula

    Applications ( [link] )

  • become more proficient at using the five-step method for solving applied problems

    Graphing quadratic equations ( [link] )

  • be able to construct the graph of a parabola

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Source:  OpenStax, Elementary algebra. OpenStax CNX. May 08, 2009 Download for free at http://cnx.org/content/col10614/1.3
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