If the roots of the quadratic equation x...

If the roots of the quadratic equation `x^(2) + kx+ 9` are equal. Then find the maximum value of K ? Options are (a) 81 (b) `+- 8` (c) `+- 6` (d) `(1)/(81)`

A

81

B

`+- 8`

C

`+- 6`

D

`(1)/(81)`

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