Question

if x=3 is one root of the quadratic equation if x is equal to 3 is 1 root of the quadratic equation X square - 2 x minus 6 is equal to zero then find value of k

Answer 1

There is no k in your question my friend please can repeat the question clearly your question doesn't seem to be correct

Answer 2

Answer:

The value of k is $k=\frac{1}{2}$

Step-by-step explanation:

Given : Quadratic equation $x^2-2kx-6=0$

To find : The value of k?

Solution :

We have given one of the root is x=3.

So, Substitute x=3 so that we get the value of k.

$x^2-2kx-6=0$

x=3

$3^2-2k(3)-6=0$

$9-6k-6=0$

$3-6k=0$

$6k=3$

$k=\frac{3}{6}$

$k=\frac{1}{2}$

Therefore, The value of k is $k=\frac{1}{2}$