In 1600‟s Rene Descartes developed the Cartesian Geometry, establishing a connection between
algebra and geometry. In Descartes time it was common to translate between the algebraic and geometric form
of polynomial equations. When the polynomial functions was plotted geometrically only the real solutions gave
a geometric meaning. This must have led Descartes to call the complex solutions as false and the square root of
the negative number as imaginary.