File:Graphical calculation of root of quadratic equation.png
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Summary
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| Description | Screenshot of a TI-89 calculator graphical computation of one of the two roots of the quadratic equation 2x2 + 4x − 4 = 0. Although the display shows only five significant figures of accuracy, the retrieved value of xc is 0.732050807569, accurate to twelve significant figures. Will be used in Quadratic equation |
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| Author or copyright owner |
Image was created by me using proprietary Texas Instruments hardware/software. I have no copyright claims whatsoever, but Texas Instruments undoubtedly does. |
| Source (WP:NFCC#4) | Original publication: Wikipedia Immediate source: Screenshot taken from a TI-89 calculator |
| Date of publication | 4/27/2013 |
| Use in article (WP:NFCC#7) | Quadratic equation |
| Purpose of use in article (WP:NFCC#8) | To illustrate use of a calculator to perform graphical computation of the roots of a quadratic equation. |
| Not replaceable with free media because (WP:NFCC#1) |
The graph, intended to illustrate use of a graphing calculator to solve a quadratic equation, necessarily includes visual design elements of the actual graphing calculator screen. These visual design elements are proprietary features of the calculator. |
| Minimal use (WP:NFCC#3) | Will be using only this one single screenshot in the article. |
| Respect for commercial opportunities (WP:NFCC#2) |
This is a computation of a single, trivial example of a quadratic equation. Texas Instruments sells calculators so that, among many other functions, their customers may freely be able to produce such images. Publication of such images will not detract from TI's ability to sell calculators. |
| Other information | Not that I can think of. |
| Fair useFair use of copyrighted material in the context of Quadratic equation//en.wikipedia.org/wiki/File:Graphical_calculation_of_root_of_quadratic_equation.pngtrue | |
Licensing
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 | This work is copyrighted (or assumed to be copyrighted) and unlicensed. It does not fall into one of the blanket acceptable non-free content categories listed at Wikipedia:Non-free content § Images or Wikipedia:Non-free content § Audio clips, and it is not covered by a more specific non-free content license listed at Category:Wikipedia non-free file copyright templates. However, it is believed that the use of this work:
qualifies as fair use under United States copyright law. Any other uses of this image, on Wikipedia or elsewhere, may be copyright infringement. See Wikipedia:Non-free content and Wikipedia:Copyrights. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:39, 2 June 2017 | | 400 × 250 (20 KB) | DatBot (talk | contribs) | Reduce size of non-free image (BOT - disable) |
| 05:06, 27 April 2013 | No thumbnail | 640 × 400 (6 KB) | Stigmatella aurantiaca (talk | contribs) | Uploading a non-free file using File Upload Wizard |
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