Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have one or many variables in any combination, and the magnitude of them is ...

Moreover, we prove that quadratic systems with minimal polynomial first integrals of degree larger than 1 have at most three invariant straight lines, and under convenient assumptions we give the ...

In this note, we extend the result to the case of quadratic polynomials. The Monthly publishes articles, as well as notes and other features, about mathematics and the profession. Its readers span a ...