+0  
 
+1
72
1
avatar

For what value of k are the roots of the quadratic equation kx (x+ 3) - 4=0 equal?

 Aug 1, 2020
 #1
avatar+28021 
+1

kx^2 + 3kx -4 = 0     for equal roots, the disciminant of the Quadratic Formula must = 0

 

b^2 - 4ac

9k^2 - 4(k)(-4) = 0

9k^2 +16k = 0

k = -16 /9     or    0 (throw out)  

 Aug 1, 2020

14 Online Users