In: Advanced Math
1. Solve the equations 256? ≡ 442(??? 60), 3? + 4 ≡ 6(??? 13).
5. Prove that ?2 + ? + 1 is an irreducible polynomial of degree 2.
1. Given equation  



, dividing by 2 throughout .
Now this equation have no solution as 
 is always even and so 
 is odd . Since even does not divides odd so 30 does not divides
 and so the equation 
 have no solution .
Hence the equation 
 have no solution .
Given equation , 


Multiplying both side by 4 we get ,






Hence the required solution are 
 that is  
5. Given polynomial 
 .
A second degree polynomial is reducible if and only if it has a root .
Now discrement of the polynomial is , 
As discreminant is negative so the polynomail has no real root and hence it is irreducible .
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If you have doubt or need more clarification at any step please comment .