Question

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

Answer 1

Put value of x in equation
So it become
3square minus 2k3 minus 6 equal to 0
9-6k-6 equal to 0
3 - 6k equal to 0
-6k equals to -3
0 equals to -3divided by -6
Hence k equals to 1upon2

Answer 2

X^2-2kx-6=0
9-6x-3=0
3-6x=0
-6x=-3
X=1/2