Question

if x=3 is one of the root of the quadratic equation x^2-2kx-6=0

Answer 1

k=1/2.................

Answer 2

ANSWER:
GIVEN,
x=3 is one of the root.
So,
substitute 3 in the place of x in the equation.
x^2-2kx-6=0
3^2-2k(3)-6=0
9-6k-6=0
3-6k=0
6k=3
k=1/2
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Hope this helps u.