New posts in Quadratics

A "new" general formula for the quadratic equation?

Solve $\sin x + \cos x = \sin x \cos x.$

Name for quadratic functions with no linear term

Find $p$ and $q$ such that $x^2+px+q<x$ iff $x \in (1,5)$

The condition that Euler's prime generating polynomial is a composite number

I’m attempting to verify a limited relationship one of my high school students observed.

Solve $2 \cos^2 x+ \sin x=1$ for all possible $x$

When does $\mbox{tr} \left( A^2 \right) = \mbox{tr} (A)^2$ hold?

Find a such that $ax^{17}+bx^{16}+1$ is divisible by $x^2-x-1$.

If 2C8$\cdot$3C1$=$90C58, what is C?