Question

If x=3 one root of the quadratic equation x-2kx-6=0, then find the value of k

Answer 1

put the value of x in eq x-2kx-6 = 0

then, 3-2k(3) -6 = 0
3-6k-6=0
-6k= 6-3
-6k = 3
k=-3/6
k=-1/2

hope it helps