Algebra
# Quadratic Discriminant

How many intersection points are there between the two graphs of the functions $y=2x^2-4x, y=3x+5?$

If real numbers $x$ and $y$ satisfy the equation $x^2+y^2-2x-14y+50=0,$ what is the value of $x+y$?

Find the values of $b$ such that $y=bx$ is a secant line to the curve $y=2x^2-b$.