This post about forms of quadratic equations. In this post general quadratic equations   with graph.This post is also include  important facts quadratics  like vertex , x-intercept and y-intercepts. The quadratic equation is an important topic in all syllabus like IB and cambridge etc

quadratic equation is an equation of the second degree, meaning it contains at least one term that is squared. The standard form is ax² + bx + c = 0 with a, b, and c being constants, or numerical coefficients, and x is an unknown variable. One absolute rule is that the first constant “a” cannot be a zero.

Quadratic Equation form

https://www.mathsisfun.com/algebra/quadratic-equation.html