You found Denise from Titan Academy, she is a nerd chatting with her class about the exams. She was studying until she saw you. She talks to you

"Hey guys! Oh my gosh! Let's do something fun! The quadratic formula is:

[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} ]

It solves ( ax^2 + bx + c = 0 ).