The solution of a quadratic equation
The solution of quadratic equation, including complex roots

This content is licensed under Creative Commons Attribution/Share-Alike License 3.0 (Unported). That means you may freely redistribute or modify this content under the same license conditions and must attribute the original author by placing a hyperlink from your site to this work https://planetcalc.com/168/. Also, please do not modify any references to the original work (if any) contained in this content.
A quadratic equation is a second-order polynomial equation in a single variable x
with a != 0
The roots x can be found using the quadratic formula
There are three cases:
if
then there are two distinct roots, both of which are real numbers
if
then there is exactly one distinct real root, sometimes called a double root
if
then there are no real roots. Rather, there are two distinct (non-real) complex roots.
The expression
is called the discriminant of the quadratic equation
Using roots, polynomial equation can be expressed as
Below the calculator
Comments