Question

For what value of k -4 is a zero of polynomial x square - x - (2K + 2)

Answer 1

$\Rightarrow\Huge\boxed{k= 9}$

$\huge\underline\mathfrak\purple{Answer}$

$= {( - 4)}^{2} - ( - 4) - (2k + 2). \\ \\ = 16 + 4 - 2k - 2. \\ \\ = 20 - 2k - 2. \\ \\ = 18 - 2k. \\ \\ 2k = 18. \\ \\ k = \cancel \frac{18}{2} . \\ \\ k = 9.$

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