If a and b are the roots of the equation...

If a and b are the roots of the equation `x^(2)- kx + 9 = 0` and satisfy` a^(2) + b^(2) = 18` then the value of k is

A

3

B

-6

C

(-6,6)

D

2

Verified by Experts

The correct Answer is:

C

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