Question

if x=3 in one of the quadratic equation x2-2kx -6 then find the value of k

Answer 1

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Answer 2

x=3
x^2-2kx-6=0
(3)^2-2k3-6=0
9-6k-6=0
3-6k=0
6k=3
k=3/6=1/2