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Math Lessons - 9


This is a series of mathematics lessons that will review the important topics in algebra. It is presented in videos by the Portland Community College

Math 65 - Lesson 15a
Applications of Quadratic Equations

Math 65 - Lesson 15b
More Applications of Quadratic Equations Working with formulas
Modelling with quadratic equations

Math 65 - Lesson 16a
Graphs of Parabolas The axis of symmetry and the vertex

Math 65 - Lesson 16b
Summary of Graphing of Quadratic Equations in Two Variables
Strategy and Examples


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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