given below

Asked by PRAMOD | 1st Dec, 2013, 02:00: PM

Expert Answer:

9x^2+6kx+4=0
Since, roots are equal, so disciminant = 0
(6k)2 - 4(9)(4) = 0
36k2 - 4 x 36 = 0
k2 = 4
k = +2. -2
 
So, the quadratic equation can be 
9x2+12x+4=0 or 9x2-12x+4=0
(3x+2)2=0 or (3x-2)2=0
x = -2/3, -2/3 or x = 2/3, 2/3

Answered by  | 1st Dec, 2013, 02:45: PM

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