Solve the Equation for X $$\left| \begin{array} { l l } x & 1 \\2 & x\end{array} \right| = - 1$$

question 138

Multiple Choice

Solve the equation for x.
- $$\left| \begin{array} { l l } x & 1 \\2 & x\end{array} \right| = - 1$$

• A) \(\{ 1 \}\)
• B) \(\{ - 1,1 \}\)
• C) \(\{ - 1 \}\)
• D) \(\varnothing\)

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