Solve For $x$ Given the Following Equation Involving a Determinant $\left| \begin{array} { c c } x + 1 & 7 \\- 1 & x + 9\end{array} \right| = 0$

question 70

Multiple Choice

Solve for $x$ given the following equation involving a determinant.
$\left| \begin{array} { c c } x + 1 & 7 \\- 1 & x + 9\end{array} \right| = 0$

• A) \(x = 8,2\)
• B) \(x = - 9 , - 1\)
• C) \(x = 9,1\)
• D) \(x = - 8 , - 2\)
• E) \(x = 8 , - 7\)

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