Question 26

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Jambmaths question: 

Evaluate $\left| \begin{matrix}   2 & 0 & 5  \\   4 & 6 & 3  \\   8 & 9 & 1  \\\end{matrix} \right|$

Jamb Maths Solution: 

$\left| \begin{matrix}   2 & 0 & 5  \\   4 & 6 & 3  \\   8 & 9 & 1  \\\end{matrix} \right|=2(6-27)-0(4-24)+5(36-48)=-42-60=-102$

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