Question 30

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Jambmaths question: 

Find the value of $\left| \begin{matrix}   0 & 3 & 2  \\   1 & 7 & 8  \\   0 & 5 & 4  \\\end{matrix} \right|$

Option A: 

10

Option B: 

12

Option C: 

–1

Option D: 

–2

Jamb Maths Solution: 

$\left| \begin{matrix}   0 & 3 & 2  \\   1 & 7 & 8  \\   0 & 5 & 4  \\\end{matrix} \right|=0(28-40)-3(4-8)+2(5-7)=10$

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