Question

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

Answer 1

p(x) = x² - 2kx - 6 = 0
p(3) = 3² - 6k - 6 = 0
      ⇒ 9 - 6k - 6 = 0
      ⇒ 3 = 6k
      ⇒ k = 1/2

Answer 2

If ur question is : x - 2kx - 6

3 - 6k - 6 = 0

-6 k - 3 = 0

k = - 1/2

_____________

If ur question is :- x² - 2kx - 6

then,

9 - 6k - 6 = 0

-6k + 3 = 0

k = 1/2