MCQ
Find the value of $\left|\begin{array}{cc}5 & 3 \\ -7 & -4\end{array}\right|$
- A$-1$
- B$-41$
- C$41$
- ✓$1$
✓
Answer
Correct option: D.
$1$
$\mathrm{D}=\left[\begin{array}{cc}
5 & 3 \\
-7 & -4
\end{array}\right]=(5 \times-4)-(3 \times-7)=-20+21=1$
Hence, option D is correct.
5 & 3 \\
-7 & -4
\end{array}\right]=(5 \times-4)-(3 \times-7)=-20+21=1$
Hence, option D is correct.
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