Question

if x ‐2 is a factor of 5x^2 ‐ kx ‐18 , find K​

Answer 1

$\begin{gathered}5{x}^{2} - kx - 18 = 0 \\ x - 2 \: is \: factor \\ put \: x = 2 \: in \: the \: equation \\ 5 {(2)}^{2} - 2(k) - 18 = 0 \\ 20 - 18 = 2k \\ k = \frac{2}{2} = 1\\k=1\end{gathered}$

Answer 2

Answer:

k = 1

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