SOLUTION: for the equation 25x^2 - kx = -4, find k so that the equation has exactly one rational root.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: for the equation 25x^2 - kx = -4, find k so that the equation has exactly one rational root.      Log On


   

Question 384812: for the equation 25x^2 - kx = -4, find k so that the equation has exactly one rational root.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
25x^2 - kx + 4 = 0

(5x - 2)^2 = 0

use FOIL to find k