An integral equation that contains only one unknown (unary) and the highest order of the unknown is 2 (quadratic) is called unary quadratic equation. The quadratic equation of one variable can be transformed into the general form ax? +bx+c=0(a≠0), where ax It is called quadratic term and a is the coefficient of quadratic term; Bx is called a linear term, and b is the coefficient of the linear term; C is called a constant term.

Extended data:

Main form

In general form, it is a quadratic term and a quadratic term coefficient;

Is a basic term; Is a linear coefficient; This is a constant term.

The value of the unknown that makes the left and right sides of the equation equal is the solution of the quadratic equation, and the solution of the quadratic equation is also called the root of the quadratic equation.

Change form? Is it a real number? Is it a real number? (It is a real number).

Matching method? Double root type

References:

Quadratic equation in one variable _ Baidu Encyclopedia