Quadratic equations means an An equation where the highest exponent of the variable (usually “x”) is a square (2). So it will have something like x2, but not x3 etc. A Quadratic Equation is usually written ax2 + bx + c = 0
In my opinion quadratic formula is the best way to solve quadratic equations. because when we just factoring our equations, we can’t solve all of them. then when we solve with completing the square it takes so long time. but with quadratic formula we can solve all of quadratic equations easy, and fast.