Complex numbers were invented so that every quadratic equation would have a solution. Mathematicians introduced a special imaginary number i such that  . Complex numbers are sums of real numbers and real numbers multiplied by i. For example, number 2-3i is a complex number.
Algebra.Com is a people's math website. It relies on people, such
as yourself, who create our content. All solvers and lessons are
submitted by algebra.com's users. They retain copyright to their
content, although they do grant rights to algebra.com.
Creating lessons is easy! Look for other lessons and
click on 'view source'. All you have to really know is mathematics.
| 
