Question

ifx= 3 is one root of the quadratic equations xSquare -2kx-6,then find the value of k

Answer 1

$if \: x = 3 \: is \: putted \: in \: \\ {x}^{2} - 2kx - 6 = 0 \\ {3}^{2} - 2 \times 3k - 6 = 0 \\ 9 - 6k - 6 = 0 \\ 3 - 6k = 0 \\ - 6k = - 3 \\ k = \frac{ - 3}{ - 6} \\ k = \frac{1}{2}$

Answer 2

Hlo mate :-

Answer :-

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x=3
is root .then,

● Puting the value of x in Qd equation

=> x^2-2k-6=0

=> 3^2-2k-6=0

=> 9-2k-6=0

:- 2k=3

=> k=3/2


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