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From Open Educational Resources
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, 10:35, 16 January 2018
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| ==== 5. Quadratic Equations ==== | | ==== 5. Quadratic Equations ==== |
| + | [https://www.geogebra.org/m/FyfuNGuD Understanding quadratic equation ax<sup>2</sup>+bx+c=0 geometrically] |
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| ==== 6. Progressions ==== | | ==== 6. Progressions ==== |