Question

If both roots of the quadratic equation 2 2 x kx k k      2 5 0 are less than 5, then k  lies in the interval ​

Answer 1

Answer:

discriminant = 0

9 k.k- 4(k+7) = 0

9 k.k - 4 k-28 = 0

k= 4+-√16+1008)/18

=4+-32/18

= 36/18 ,-30/18

= 2,-5/3

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