Question

Find the value of $k$, for which one root of the quadratic equation $k{x}^2-14x+8=0is2$

Answer 1

$k{x}^2-14x+8=0$

$Ifx=2,$

$k\times 2^2-14\times 2+8=0$

$k\times 4-28+8=0$

$k\times 4-20=0$

$k\times 4=20$

$k=5$