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Goldenberg, E. Paul; Carter, Cynthia J. – Mathematics Teacher, 2017
A first-year algebra student's curiosity about factorials of negative numbers became a starting point for an extended discovery lesson into territory not usually explored in secondary school mathematics. In this article, the authors, math teachers in Massachusetts, examine how to solve for factorials of negative numbers and discuss how they taught…
Descriptors: Algebra, Secondary School Mathematics, Numbers, Mathematics Teachers