New posts in Minimal Polynomials

Show $\mathbb{Q}( \sqrt{5},\sqrt{7} ) = \mathbb{Q}( \sqrt{5} + \sqrt{7} )$

Minimal polynomial of $\alpha + \beta$ over $\mathbb{Q}$

If $A$ is a matrix such that $A^T = A^2$, what are eigenvalues of $A$?

Minimal polynomial of $\sqrt{2+\sqrt[3]{3}}$ over $\mathbb{Q}$

Show that the characteristic polynomial is the same as the minimal polynomial

Minimal polynomial of extension of degree 2 over a finite field with characteristic 2

$\sqrt[3]{3} + \sqrt[3]{9}$ is algebraic over $\mathbb{Q}$

degree of a sum of two algebraic numbers

Are there uncountably many $A\in M_3 (\mathbb {R})$ such that $A^8=I $?

Minimum polynomial of a root involving the 7th root of unity