Question

if x=3 is one root of the quadratic equation
${x}^{2 -} - 2kx - 6 = 0$
then find the vali of k.​

Answer 1

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$k = \frac{1}{2}$
Steps in the attachment.

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Answer 2

Answer:

K=1/2

Step-by-step explanation:

x^2 - 2kx - 6=0

x=3

put the value of x in equation

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

9 - 6k -6 = 0

6k = 3

k=3/6

So, K=1/2