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Solving Quadratic Equations by Graphing Instructional VideoSolving Quadratic Equations by Graphing Instructional Video
Publisher
Curated OER
Resource Details
Curator Rating
Educator Rating
Not yet Rated
Grade
7th - 11th
Subjects
Math
2 more...
Resource Type
Instructional Videos
Media Length
10:51
Audiences
For Teacher Use
1 more...
Instructional Strategy
Flipped Classroom
Usage Permissions
Fine Print
Instructional Video

Solving Quadratic Equations by Graphing

Curated and Reviewed by Lesson Planet

With his trusty graphing calculator, Sal begins his lecture on solving quadratic functions by graphing. The video is a good way to show young mathematicians not only how to use the graphing calculator (which Sal describes as "archaic" compared to modern cell phones), but how to analyze the graph once it's completed.

17 Views 13 Downloads

Concepts

graphing quadratics, graphing, quadratic equations

Additional Tags

graphing quadratic equations, solving quadratic equations, solving quadratic equations by graphing, math

Classroom Considerations

  • This video is hosted on YouTube

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After correcting the last problem in his previous video, Sal explains how to graph quadratic functions. Those with difficulty graphing algebraic functions will find Sal's instruction and easygoing manner a welcome change from staring at...
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Sal first solves some equations using the factoring method he has already taught. Next, he introduces the quadratic formula and demonstrates how to plug the numbers from the quadratic equation into the quadratic formula. He then solves...
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Map the input to the output and see what pupils create. The video lesson provides an introduction to graphing quadratic functions using an input-output table. The instructor shows each step of the calculations when evaluating the function.
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Interactive

GeoGebra Graphing Calculator

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So, exactly, what does it look like? The easily usable graphing calculator allows pupils to visualize the graph of equations and inequalities. The interactive supports any algebraic graph needed for high school mathematics and then some.
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Lesson Plan

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This worksheet is part of the TI-Nspire lesson on the quadratic formula. Pupils determine the solutions of a quadratic function by looking at a graph and the discriminant. They use the quadratic formula to solve quadratic functions on...
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Unit Plan

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[Free Registration/Login may be required to access all resource tools.] Learn how to use graphs to solve quadratic equations.
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