Quadratic function

In algebra, Quadratic function is function that contains an expression where its degree (the highest exponent it has) is 2, which means that it is quadratic (See etymology). Its single-variable standard form isː
formula_1
When such a function gets plotted on a graph where formula_2, a curve that extends infinitely called a parabola will appear.
Etymology.
The word "quadratic" comes from the Latin word "quadrātum" ("square"). This is because of the presence of a number (which isformula_3 in the standard form) that is the result of squaring its square root (formula_4).