Question

The value of the determinant $\left| \begin{matrix} 2 & 8 & 4 \

• 5 & 6 & - 10 \ 1 & 7 & 2 \end{matrix} \right|$is.

• A. – 440
• B. 0
• C. 328
• D. 488

Answer 1

Answer: (B)

0

Answer 2

$\left| \begin{matrix} 2 & 8 & 4 \

• 5 & 6 & - 10 \ 1 & 7 & 2 \end{matrix} \right| = 2\left| \begin{matrix} 2 & 8 & 2 \
• 5 & 6 & - 5 \ 1 & 7 & 1 \end{matrix} \right| = 0$

(Taking 2 common from $C_{3}$).