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Jenna McWilliams
Jenna McWilliams
(Bloomington - United States)

I studied creative writing and published some poems. Then I decided to  get all up in education's grill. I'm currently a doctoral student in the Learning Sciences program at Indiana  University.
keywords: participatory culture, social media, education,  ...

Lesson 17: Quadratic Inequalities

The lesson begins with using graphs to solve quadratic inequalities. AN equation modeling the height of a rocket is graphed along with a second equation that represents the minimum height at which the rocket can legally and safely be exploded. The intersections of the graphs provide the solution interval. A second method is then presented where the inequality is put into standard form and then solved for its x-intercepts. Interval notation and union of sets is reviewed before a purely algebraic procedure for solving the inequalities is presented. The lesson concludes with an application problem.

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