SOLUTION: compute the value of the disscrimnat and give the real solutions to the quadratic equation. -9x^2-6x-1=0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: compute the value of the disscrimnat and give the real solutions to the quadratic equation. -9x^2-6x-1=0      Log On


   

Question 256940: compute the value of the disscrimnat and give the real solutions to the quadratic equation.
-9x^2-6x-1=0
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
We have the equation
-9x%5E2-6x-1=0
The discriminant is defined as b^2-4ac or the stuff under the sqrt.
In our exampl, we get
D+=+%28-6%29%5E2+-4%2A%28-9%29%28-1%29
D+=+36+-+36 - -> D = 0.
The real solutions are found with the quadratic. We get
X = 6 / -18 = -1/3.