1.

(6x^2 + x + 3)x(5x^2 + 2) in Z_10 =(a) x^3 + 2x + 6(b) 5x^3 + 7x^2 + 2x + 6(c) x^3 + 7x^2 + 2x + 6(d) None of the mentionedThe question was asked by my college director while I was bunking the class.I'm obligated to ask this question of Polynomial and Modular Arithmetic- IV in section Basic Concepts in Number Theory and Finite Fields of Cryptograph & Network Security

Answer»

Correct option is (B) 5x^3 + 7x^2 + 2x + 6

Best EXPLANATION: (6x^2 + x + 3)x(5x^2 + 2) in Z_10 =5x^3 + 7x^2 + 2x + 6. We can FIND this via basic polynomial arithmetic in Z_10.



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