If x = 3 is 1 root of the quadratic of x square - 2 x minus 6 equals zero then find the value of k

If x = 3 is 1 root of the quadratic of x square - 2 x minus 6 equals z

1.	If x = 3 is 1 root of the quadratic of x square - 2 x minus 6 equals zero then find the value of k
Answer» Substitute value of x as 3 in given equation and then find k..