Electronic Proceedings of the Twentythird Annual International Conference on Technology in Collegiate MathematicsDenver, Colorado, March 1720, 2011Paper C009
This is an electronic reprint, reproduced by permission of Pearson Education Inc. Originally appeared in the Proceedings of the Twentythird Annual International Conference on Technology in Collegiate Mathematics, ISBN 0321689844, Copyright (C) 2012 by Pearson Education, Inc. 
Solving Cubic Congruences Modulo A Prime On The TI 89 
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The author presents a technique which implements Cardano’s classical method to solve the cubic congruence: Ax
^{3} + Bx
^{2} + Cx+D 0 (modulo p) where p is a prime. Discussion centers around the components needed to apply Cardano’s method in this situation: modular exponentiation, modular inverses and finding square roots and cube roots modulo a prime p.
Keyword(s): number theory, TI89