New posts in Quadratics

Spivak's Calculus: Chapter 1, Problem 18b (Quadratic determinant less than zero)

$x^2+y^2=1$, find min/max of $(3x+2y)^2+(x+2y)^2$

Solving a biquadratic.

Do Irrational Conjugates always come in pairs?

Solving a complex quadratic-like equation

Interesting Olympiad Style Problem about Invariance

On $\sum_{n=0}^\infty \frac{1}{n^2+bn+c} = \frac{\pi \tan\big(\frac{\pi}2\sqrt{b^2-4c}\big)}{\sqrt{b^2-4c}}+x$ and solvable Galois groups?

Are all quadratics factorable into a product of two binomials?

Why does the discriminant in the Quadratic Formula reveal the number of real solutions?

Solve the equation $2x^2-[x]-1=0$ where $[x]$ is biggest integer not greater than $x$.