1st watch these videos, then Read "Objective 2" on p264, 265. We will do the HW and answer questions in class.
Solving quadratic equations by graphing. http://www.phschool.com/atschool/academy123/english/academy123_content/wl-book-demo/ph-293s.html
Video on how to use graphing calculator to find the zeros of a function. (you can follow the exact same steps to find zeros of a quadratic function). http://www.youtube.com/watch?v=RxA8YMRF4M4
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