If Q is\( \left[ \begin{array}{cc} 9 & -2 \\ -7 & 4 \\ \end{array} \right]\)
MATHEMATICS
JAMB 2009
If Q is\( \left[ \begin{array}{cc}
9 & -2 \\
-7 & 4 \\
\end{array} \right]\) , then |Q| is?
- A. -50
- B. -22
- C. 22
- D. 50
Correct Answer: C. 22
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