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Home > CCA > Chapter 9 > Lesson 9.1.3 > Problem 9-28

9-28.

Use the Quadratic Formula to solve part (b) of problem 9-27 above. Did your solution match the solution you got by factoring and using the Zero Product Property (in part (b) of problem 9-27)?

Example 2: Solve for using the Quadratic Formula.

Solution: This method works for any quadratic.  First, identify , and  equals the number of -terms, equals the number of -terms, and equals the constant. For , and .  Substitute the values of , and into the Quadratic Formula and evaluate the expression twice: once with addition and once with subtraction. Examine this method below:

  

   

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