D b2-4ac If 4ac b 2 then the solution will have non-zero imaginary part. A positive number inside the square root. Where there are two distinct real solutions if the discriminant b2 4acis positive one double real solution if the discriminant is 0 and no real solutions if the discriminant is negative.
Frac -b b2 4ac 12 2a 2abb2 4ac12.
If the discriminant is zero the polynomial has one real root of multiplicity 2. X b b 2 4 a c 2 a. Frac -b b2 4ac 12 2a 2abb2 4ac12. Virtual Nerds patent-pending tutorial system provides in-context information hints and links to supporting tutorials synchronized with videos each 3 to 7 minutes long.