1.

On multiplying (x5 + x2 + x) by (x7 + x4 + x3 + x2 + x) in GF(28) with irreducible polynomial (x8 + x4 + x3 + x + 1) we get

A. x<sup>12</sup>+x<sup>7</sup>+x<sup>2</sup>
B. x<sup>5</sup>+x<sup>3</sup>+x<sup>3</sup>
C. x<sup>5</sup>+x<sup>3</sup>+x<sup>2</sup>+x
D. x<sup>5</sup>+x<sup>3</sup>+x<sup>2</sup>+x+1
Answer» E.


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