SOLUTION: Find one value of k for which the given equation has equal roots: 4x^2+2kx+9=0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Find one value of k for which the given equation has equal roots: 4x^2+2kx+9=0      Log On


   

Question 1096572: Find one value of k for which the given equation has equal roots: 4x^2+2kx+9=0
Found 2 solutions by Alan3354, MathTherapy:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Find one value of k for which the given equation has equal roots: 4x^2+2kx+9=0
----------
--> Discriminant = 0
(2k)^2 - 4*4*9 = 0
4k^2 = 144
k^2 = 36
k = +/- 6

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

Find one value of k for which the given equation has equal roots: 4x^2+2kx+9=0
I'll give you 2! You choose!

highlight_green%28matrix%281%2C3%2C+k%2C+%22=%22%2C+%22%22%2B-+6%29%29