(8) Show that each polynomial is irreducible in Q[x]. (a) 3x3 + 5x2 + x +...
3. Prove that p(x) = 3x3 + 22x2 + 38x + 34 is irreducible in Q[x].
6. One root of the polynomial f(x) = 2x5 – 23x4 + 76x3 – 9x2 – 246c +234 over C is 5 - i. (a) Write f(x) as a product of irreducible polynomials in Q[x]. Show your work. (b) Write f(x) as a product of irreducible polynomials in R[x]. Show your work. (c) Write f(x) as a product of irreducible polynomials in C[x]. Show your work.
Rings and fields- Abstract Algebra
2. (a) (6 points) Let f (x) be an n over a field F. Let irreducible polynomial of degree g() e Fx be any polynomial. Show that every irreducible factor of f(g()) E Flx] has degree divisible by n (b) (4 points) Prove that Q(2) is not a subfield of any cyclotomic field over Q.
2. (a) (6 points) Let f (x) be an n over a field F. Let irreducible polynomial of degree g()...
Question 8 a) Find: (3x3 – 5x2 + x - 4) dx (4 marks) b) Use the trapezium rule with 6 strips to approximate the area bounded by the curve y = (x - 1, the x -axis and the lines x = 2 and x = 5 (6 marks)
Prove that the polynomial 9x^4 + 4x^2 − 3x + 7 is irreducible in Q[x].
Show that the irreducible polynomial x4 - 2 over Q, has roots a, b, c in its splitting field such that the fields Q(a, b) and Q(a, c) are not isomorphic over Q (Hint: The roots are (4√2, -4√2, 4√2i, -4√2i), and the splitting field is Q(4√2, i,).)
17. The real number a = cos 20° is a root of the irreducible polynomial f(x) = 4x? – 3x 3x = in Q[x]. Let E = Q[cos 20°). Show that f(x) splits in E.
Write the polynomial f(x) as a product of irreducible polynomials in the given ring. Explain in each case how you know the factors are irreducible. 1) f(x) -x* + 2x2 +2x 2 in Z3[x]. 2) f(x)4 + 2x3 + 2x2 +x + 1 in Z3[x]. 3) f(x) 2x3-x2 + 3x + 2 in Q[x] 4) f(x) = 5x4-21x2 + 6x-12 in Q[x)
Find the irreducible polynomial of 1 + i over Q.
Solve the linear system x + 2x2 + 3x3=7 2x, + 5x2 + 3x3 = 12 X, + Ox₂ + 8x₂ = 10.