Question

If x = 3 is one root of the quadirate equation x2 - 2 x r -6 = 0 than find the value of k

Answer 1

2x-2xk-6=0
X=3
k=??

2(3)-2(3)k-6=0
6-6k-6=0
-6k=0
k=0/-6
k=0

this is your answer...