Question

If x = 3 one root of the equation is

Answer 1

(3)2-2k-6=0
9-2k-6=0
3=2k
k3/2

Answer 2

Given that x = 3

x^2 -2k -6 = 0

putting the value of x,

3^2 -2k = 6

9 - 2k = 6

-2k = 6-9

-2k = -3

2k = 3

k= 3/2


i hope this will help you

-by ABHAY