Question

If x=5 is one root of quadratic equation x2_2kx find k

Answer 1

$x = 5 \\ \\ {x}^{2} - 2kx \\ put \: the \: value \: of \: x \\ {5}^{2} - 2 \times 5 \times k = 0 \\ 25 - 10k = 0 \\ - 10k = - 25 \\ k = \frac{ - 25}{ - 10 } \\ k = 2.5$
$thanks$