SOLUTION: Describe the nature of the roots of the following quadratic: y=x^2-3x-9

Algebra ->  Real-numbers -> SOLUTION: Describe the nature of the roots of the following quadratic: y=x^2-3x-9      Log On


   



Question 313233: Describe the nature of the roots of the following quadratic: y=x^2-3x-9
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


For any quadratic polynomial equation of the form:



Find the Discriminant, and evaluate the nature of the roots as follows:


Two real and unequal roots. If is a perfect square, the quadratic factors over .

Two real and equal roots. Alternatively, one real root with a multiplicity of two. That is to say that the trinomial is a perfect square and has two identical factors.

A conjugate pair of complex roots of the form where is the imaginary number defined by

John