SOLUTION: -9x^2+6x-1=0 discriminant = ? # of real solutions = ? I think the discriminant is 0 and the # of real solutions is 2...but I'm not sure. Can you help? THANKS!

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: -9x^2+6x-1=0 discriminant = ? # of real solutions = ? I think the discriminant is 0 and the # of real solutions is 2...but I'm not sure. Can you help? THANKS!      Log On


   

Question 424392: -9x^2+6x-1=0
discriminant = ?
# of real solutions = ?
I think the discriminant is 0 and the # of real solutions is 2...but I'm not sure. Can you help? THANKS!
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
If the discriminant is 0, there can only be one real solution (however it is a double root).

The discriminant is b%5E2+-+4ac, where a = -9, b = 6, c = -1. This is indeed equal to zero, so one real solution.