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Diagonal Matrix

Evaluate 2 ...

Question

Evaluate $∣ ∣ ∣ \begin{matrix} 2 & 4 - 1 & 2 \end{matrix} ∣ ∣ ∣$

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Solution

Given : $∣ ∣ ∣ \begin{matrix} 2 & 4 - 1 & 2 \end{matrix} ∣ ∣ ∣$
$= 2 \times 2 - (- 1) \times 4$
$= 4 + 4$
$= 8$

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Diagonal Matrix

Standard X Mathematics

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