mfultz
January 20, 2014
1539
10:29
Quadratics #2A
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1511
16:59
Quadratics #2B
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1555
17:13
Quadratics #3
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1494
21:37
Solving Quadratics U...
jbarnes
1361
14:10
Quadratics #2
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1596
07:12