Question

If 3 is one of the roots of the quadratic equation x^2-2kx+6=0

Answer 1

x= 3
put the value of x in eqn.
9 - 2(3)k + 6 = 0
9- 6k + 6 =0
3- 6k = 0
k = -3/-6
k= 1/2

Answer 2

Hi here is your answer
ATQ
x=3
put the value of x in given equation
(3)^2-2×3×k+6=0
9-6k+6=0
15-6k=0
-6k=-15
k=15/6,5/2