Question 475756
The standard form of the quadratic equation is {{{ax^2+bx+c=0}}}, where a, b, c

are real numbers and a is different from zero. The discriminant of the quadratic 

equation is the expression {{{b^2-4ac}}} If {{{b^2-4ac>0}}} the quadratic 

equation has two real roots. If {{{b^2-4ac=0}}} the quadratic equation has one 

real root, and if {{{b^2-4ac<0}}} the quadratic equation has not real solution.

Example:For the equation {{{-x^2+12x+20=0}}} the discriminant is:

12^2-4(-1)*20=144+80=224>0, this equation has two real roots.