There is only one whole number solution between 0 and 11 of the congruence equation (x^2 +3x+7)equiv 2 mod 11. Find the solution.

Diego Barr

Diego Barr

Answered question

2022-10-24

There is only one whole number solution between 0 and 11 of the congruence equation ( x 2 + 3 x + 7 ) 2 mod 11. Find the solution.

Answer & Explanation

Finnegan Stone

Finnegan Stone

Beginner2022-10-25Added 11 answers

( x 2 + 3 x + 7 ) = 2 mod 11
Find a whole number x<11, such that x 2 + 3 x + 7 2 11 is an integer
if x = 0 , = 5 11
if x = 1 , = 9 11
if x = 2 , = 15 11
if x = 3 , = 23 11
if x = 4 , = 33 11 = 3 is an integer.
if x = 5 , = 45 11
if x = 6 , = 59 11
if x = 7 , = 75 11
if x = 8 , = 93 11
if x = 9 , = 113 11
if x = 10 , 135 11
Therefore, there is only one whole number solution, x=4.

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