Solving Quadratic Equations by Completing the Square


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These lessons, with videos, examples and step-by-step solutions, help Algebra students learn to solve quadratic equations by completing the square.




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The following diagram shows how to use the Completing the Square method to solve quadratic equations. Scroll down the page for more examples and solutions of solving quadratic equations using completing the square.

Complete the Square

Printable & Online Algebra Worksheets

Completing the Square - Solving Quadratic Equations

Examples:

  1. x2 + 6x - 7 = 0
  2. 2x2 - 10x - 3 = 0
  3. -x2 - 6x + 7 = 0

Quadratic Equations - Completing the Square

Examples:

  1. x2 + 12x - 31 = 0
  2. x2 - 8x + 10 = 0
  3. 2x2 - 10x + 8 = 0
  4. 3x2 - 8x + 5 = 0



Solving a quadratic by completing the square



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