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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